MacKay, known for his videos, paintings, other works depicting the wars in Somalia and Afghanistan, ripped up a Kandahar Air Field scene while on CBC TV's Power and Politics on Tuesday.
MacKay told host Evan Solomon he plans to destroy four more pieces on Parliament Hill on Thursday.
MacKay told the CBC he hopes his act will make people "wake up" to how the government is doing business.
MacKay noted he was destroying a piece of history, but said it was necessary to draw public attention to what he sees as the erosion of democracy in Canada.
Most of MacKay's works from the Somalia and Afghan series are held by the Canadian War Museum.
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