That is a very good point. Everyone always says that you can't draw blood from a stone, and that is a real problem when incomes are so low that it may not even be economically efficient to be saving. It might be better to pay down debt or do other things with your money rather than put it into a tax-sheltered plan.
Nevertheless, the supplemental CPP is such an advantage over existing products because there are no fiduciary obligations placed on the employer. They can't be sued for poorly administering the plan. The economies of scale alone could generate probably at least a 2% risk-free rate of return. So it's as if you went into the market and got a 2% product with no risk.
If you can contribute even 1%, the fact that you get your money administered on such a scale means that you end up with a higher real return on your money than you would anywhere else. If you were to put 1% in an RRSP, in a mutual fund that's invested in equities, the company would charge you a fee of 2% to 2.5%, so you would actually be wasting your money. These economies of scale would actually generate wealth. That's why I talk about the $10 billion. This is money that would go into your pockets instead of the pockets of financial institutions.