Michelle Simson, a former Liberal MP who was punished by her own party for posting her expenses online, thinks Liberal Leader Justin Trudeau's push for his party's MPs and senators to list expenses on their websites doesn't go far enough.

"What is wrong with posting every dime," she said in an interview from Toronto. After being elected as the MP for Scarborough Southwest in 2008, Simson began posting her expenses online in exhaustive detail, even how much she spent on Christmas cards mailed to constituents.

Trudeau's plan for expense postings, to start Wednesday, is based on how cabinet ministers currently list travel and hospitality costs, with totals recorded for each event and trip but with no details or breakdown.

Simson, who was defeated in the last election, said when she refused to stop posting in 2010, she was forbidden by the Liberal Party whip from asking questions in question period and prevented from giving a member's statement, which meant she couldn't honour a soldier in her riding who was killed in Afghanistan.

At that time, the party was led by Michael Ignatieff

Simson thinks the current Liberal plan is “a step in the right direction. I'm actually buoyed by that. We have a baby step, we have our toe in the water, you know, let's kind of dive right in."

Trudeau, speaking to reporters Tuesday in the foyer of the House of Commons, said his plan is "the first step on what I hope will be a cascade of transparency and openness as the other parties try to outdo each other."

But at the moment, he admitted, in answer to a reporter's question, there would be no way to tell if an MP charged a $16 glass of orange juice, as former Conservative cabinet minister Bev Oda did in a move that led to her eventual resignation.

In June, on the final day of sitting before the House adjourned, a motion put forward by Trudeau to have all MPs post expenses online was defeated. But an NDP motion, mandating a study of how MPs claim expenses, including a closer look at Trudeau's suggestion, was passed unanimously.

Simson describes this action as "a stall tactic."

"What's to study," she said. "It's not their money."

Currently, all MPs and senators' quarterly expenses are posted online by House of Commons staff, but only in aggregate amounts, such as $80,000 for travel per quarter, and $25,000 for accommodation, with no explanations.

"I'm dying to see the results for the next fiscal year, how much spending has dropped, because this [change] is coming," Simson said.

Simson thinks MPs should even provide restaurant receipts when they claim their $80 daily allowance for being in Ottawa on parliamentary business, especially since MPs already get so many meals provided for them.

"The House of Commons, in the lounge — they have their hot lunch, free lunch, and there are events that you're going to where you're grazing all night," she said. "There are breakfast meetings, and if your committee met over lunch, they brought lunch in, dinner too.

"To me, that was non-taxable supplementary income."

Party discipline was also imposed on Liberal MP Scott Andrews who, along with Simson, posted his expenses online.

CBC News has obtained an email, written by the MP who represents the Newfoundland and Labrador electoral district of Avalon, sent just before the 2011 election to Ignatieff, who was the party's leader at the time.

"Michael, this has to stop," Andrews wrote, complaining he'd been denied giving a simple member's statement about an event in his riding. "My time in the penalty box has gone on long enough."

Reached Tuesday as he was travelling in a taxi from the Ottawa airport, Andrews said the shunning he experienced was only for a short time. "It was part of a systemic problem in the Liberal Party back then and hopefully now forced out and we're rebuilt.

"No study needs to be done on this,” he said, talking about the plan to study the issue. “It isn't rocket science, right?".

Green Party Leader Elizabeth May, the only MP who currently posts expenses, scans taxi slips and copies of her economy-class airline tickets and posts them. She even includes the bill from the office cleaner.

May has said there's nothing to stop Conservative and NDP MPs from unilaterally posting expenses in the same fashion she does. "They're afraid of their party bosses," she said.

She thinks MPs should choose to fly economy class, as she does, to save taxpayers' money.

One Conservative senator, Doug Black, has been posting his expenses, even the amounts claimed for printer ink and batteries, since he was appointed to the Senate in January,

Conservative Senator Bob Runciman says he intends to post his expenses by the end of the month. He told CBC News it's because he was appointed, rather than elected, and thinks senators should be held to a higher standard than MPs who can be kicked out of office by voters.

In response to Trudeau's remarks Tuesday, Conservative House leader Peter Van Loan issued a statement about the all-party committee that is studying how MPs disclose expenses: “Working with all parties on this initiative is very important, and we are looking forward to further discussions with them."

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  • Prime Minister Trudeau and his then-wife Margaret leave the city's Notre Dame Basilica Sunday afternoon after the christening of their 22-day old infant Justin Pierre James, Jan. 16, 1972. Tasseled shawls kept the baby hidden from photographers and the 10-degree-below-zero weather.

  • Eleven-month-old Justin Trudeau, urged on by his mother Margaret Trudeau, crawls up the steps of an aircraft in Ottawa Dec. 5, 1972 to meet his father, then-prime minister, Pierre Trudeau on his return from Britain.

  • Pierre Trudeau is saluted by RCMP Officer as he carries son Justin to Rideau Hall in 1973. <a href="http://www.huffingtonpost.ca/2013/02/14/justin-trudeau-cries-cried-photo-loyalist-college_n_2690299.html">Justin Trudeau teared up when he was presented with a framed copy while visiting Loyalist College in 2013</a>.

  • Alexandre (Sacha) Trudeau delivers a right hook to his older brother Justin during a play fight in 1980 at Ottawa airport as the boys await a flight with the return of their father, then-prime minister, Pierre Trudeau. Nobody was injured. Justin was born in 1971 and Sacha in 1973 - both on Christmas day.

  • March 1979 photo of the Trudeau children: Michel (front), Alexandre (Sacha) and Justin (rear).

  • It was a big day for Dad, but a long day for the three Trudeau children. Left to right, Justin, Michel and Alexandre (Sacha) Trudeau attended the swearing in ceremonies of their father Pierre Elliott Trudeau as Prime Minister March 3, 1980 at Government House.

  • Then-prime minister Pierre Trudeau and 10 year-old son Justin walk toward a plane at CFB Ottawa on Nov. 7, 1982.

  • Then-prime minister Pierre Trudeau, left, watches as his 11-year-old son Justin swings on a chain during a tour of an old fort in the Omani town of Nizwa Dec. 2, 1983. Trudeau and Justin spent the day visiting the towns of Jebel and Nizwa 165 kilometres south of Muscat.

  • Then-prime minister Pierre Trudeau's 11-year-old son Justin jumps off an old cannon while visiting a fort along with his father in the Omani town of Nizwa and Jebel.

  • Justin Trudeau and friend Mathieu Walker in the Sahara desert in October, 1994.

  • Justin Trudeau and friend Mathieu Walker in the Sahara desert in October, 1994.

  • Justin Trudeau with friends Mathieu Walker and Allen Steverman in Shanghai in 1994.

  • Justin Trudeau with friends Mathieu Walker (left) and Allen Steverman (centre) at the Great Wall of China in 1994.

  • Former prime minister Pierre Trudeau (L), his son, Alexandre (Sacha), ex-wife Margaret Kemper and son Justin weep as they leave a memorial service for their son Michel in Montreal in 1998. Michel Trudeau drowned after being swept into a lake during an avalanche in British Columbia.

  • Justin (left) and Alexandre (Sacha) Trudeau lean out of the funeral train to show appreciation to mourners who turned out to pay their respects to former prime minister Pierre Trudeau in Dorval, Que., Monday Oct. 2, 2000. Trudeau's casket was moved from Ottawa to Montreal for a state funeral. ()

  • Justin Trudeau is consoled by his mother Margaret after reading the eulogy for his father, former prime minister Pierre Trudeau during his state funeral in Montreal, Tuesday, Oct. 3, 2000.

  • Justin Trudeau delivers a eulogy for his late father Pierre Trudeau during the state funeral for the former prime minister at the Notre-Dame Basilica in Montreal, Tuesday, Oct. 3, 2000. Trudeau first caught the public heartstrings in October 2000, when he delivered a moving, deeply felt eulogy for his legendary father, weaving an emotional spell from inside the cavernous Notre-Dame Basilica in Montreal.

  • Justin Trudeau breaks down on his father's casket after reading the eulogy during the state funeral for former prime minister Pierre Trudeau Tuesday, Oct. 3, 2000 in Montreal.

  • Justin Trudeau gives a rose to a young girl, one of thousands of mourners who stood outside Notre-Dame Basillica in Montreal Tuesday, October 3, 2000 during a state funeral for his father, former prime minister Pierre Elliott Trudeau.

  • An enthusiastic Justin Trudeau talks to reporters during a news conference to promote avalanche awareness in West Vancouver Thursday Jan. 25, 2001.

  • Justin Trudeau stands at the base of a mountain near the evidence of a controlled avalanche at Lake Louise, Alberta, Friday January 12, 2002.

  • Trudeau with adviser and friend Gerald Butts in July 2003 at Virginia Falls, Nahanni National Park Reserve in the Northwest Territories.

  • Justin Trudeau carves through a gate during a celebrity slalom race in Mont Tremblant, Que. Friday, Dec. 12, 2003. Trudeau was taking part in a 24-hour ski-a-thon for charity organized by Jacques Villeneuve and Villeneuve's manager Craig Pollock.

  • Justin Trudeau spoke to students as Sisler High School about the benefits of joining the Katimavik Project on March 9, 2004

  • Justin Trudeau, son of the late prime minister Pierre Trudeau, leaves with his new bride Sophie Gregoire in his father's 1959 Mercedes 300 SEL after their marriage ceremony in Montreal Saturday, May 28, 2005.

  • Sophie Gregoire waves to the crowd as she arrives for her wedding to Justin Trudeau, son of the late prime minister Pierre Trudeau, in Montreal Saturday, May 28, 2005.

  • Then-leadership candidate Stéphane Dion crosses paths with Justin Trudeau, a supporter of Gerard Kennedy, at the Liberal Leadership Convention on Nov. 30, 2006 in Montreal. The day after he won the leadership, Dion told Trudeau he needed his help and urged him to run.

  • Former prime minister Jean Chretien meets Justin Trudeau at the Liberal leadership convention, Friday, Dec. 1, 2006, in Montreal.

  • Justin Trudeau poses in London, Ont., on Tuesday, June 5, 2007 with a group of youth who participated in the Katimavik national youth service program that he has been actively involved in. The funny faces came from a request by a parent taking a photograph.

  • Justin Trudeau raises his arms in victory after being voted in as the Liberal representative in Montreal's Papineau riding, on April 29, 2007.

  • Justin Trudeau, then Liberal candidate for the riding of Papineau, on the campaign trail with his mother, Margaret, in Montreal on Sept. 23, 2008. Trudeau snatched the riding from the Bloc Québécois by 1,189 votes.

  • Liberal Justin Trudeau, then a candidate in the riding of Papineau, on the campaign trail in Montreal, Tuesday Sept. 23, 2008 with his mother, Margaret.

  • Then-Liberal Leader Stephane Dion chats with Justin Trudeau in Vancouver before boarding the campaign plane to fly to Ontario, Oct. 7, 2008.

  • Justin Trudeau apologizes for swearing at Environment Minister Peter Kent in the House of Commons Dec. 14, 2011.

  • Justin Trudeau poses in this official photo for his boxing match with Senator Patrick Brazeau.

  • Senator Patrick Brazeau, right, and Liberal MP Justin Trudeau take part in a weigh-in for a upcoming boxing match Wednesday March 28, 2012.

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  • Senator Patrick Brazeau, right, and Liberal MP Justin Trudeau take part in a charity boxing match for cancer research Saturday, March 31, 2012 in Ottawa .

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  • Liberal MP Justin Trudeau kisses his wife Sophie Grégoire after winning a boxing match against Senator Patrick Brazeau on Saturday, March 31, 2012 in Ottawa.

  • Liberal MPs, including Justin Trudeau, look on as Senator Patrick Brazeau holds a Liberal hockey sweater on Parliament Hill Ottawa, Monday April 2, 2012.

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  • Liberal MP Justin Trudeau announces he will seek the leadership of the party at a news conference, Tuesday, October 2, 2012 in Montreal.

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  • Justin Trudeau, right, chats to his chief advisor Gerald Butts after taking part in the the Liberal leadership debate in Mississauga, Ont., on Saturday, February 16, 2013.

  • Marc Garneau, left, and Justin Trudeau take part in the Liberal leadership debate in Mississauga, Ont., on Feb. 16, 2013.