The next generation may still put money on the market for their pensions, but even if they do, their flows into the market will be compensated by outflows of the boomer generation, drawing pensions.
Politically, you could also say that the generation that fought for a lot of individual rights and (social) freedoms got slightly intoxicated by the (economic) freedoms that came along somehow and the individualism they fostered. In the long run, we're all dead. John Maynard Keynes
Baby boomers also have observed their kids becoming teens and doing the teen things. As a result, boomers rediscovered religion - there's no better way to keep your kids in check, and doing drugs and free love is much more fun than watching your kids doing the same -which helped Republicans, of course. But the effect is wearing off. Will GOP become the AARP political wing now?
What is also clear now is that window of opportunity for hurting Social Security has closed forever.
