As one of the other presenters mentioned, the problem with some of the other planning tools, specifically the RRSP or eventually the RRIF, is that they're going to be taxable upon withdrawal. If somebody of modest means is potentially a candidate for the guaranteed income supplement, adding to their taxable income is just working at cross-purposes with the idea of continuing to be eligible for government benefits.
The beautiful part about the tax-free savings account is that it provides a way for people to efficiently save for their future without some future punitive situation where they're going to be facing an additional tax burden when they go to spend their own money.
As somebody mentioned—