How about the fact that as the overall population becomes top heavy with the elderly and fewer young people ... the economy won't be able to sustain paying for older people because there will be too few young people driving the economy.
This isn't meant to divide ... this is an honest worry of mine because I'm middle aged and by the time I get old and feeble, the economy probably won't be able to afford to care for people my age.
Unless you're a billionaire, millionaire or the child of one, we're all screwed.