[teyc]

This is the usual demographic problem. However, the problem is bigger on the military end - you can't defend your interests if 1) you don't have the money 2) if you don't have the manpower.

However, the back to the problem with taxing jobs out of existence: fortune is on youths side. As bad as the problem may sound, once the problem hits criticality, you get a sudden societal upheaval and things right itself immediately. No one should count on their pensions as being forever.