If you remove money from that account, you're stripping tax-free compounding of some of its power. For example, you have $13,980 in your RRSP. Instead of letting it sit, you remove $5,000 for a trip to Vegas and some credit card debt, leaving a balance of $8,980. After 20 years you will have $16,220. That is (very basically) a difference of $9,000.