Ah, sorry. I misread your post. At least in Australia, the really expensive 'contingent liability' (i.e. future tax burden on Gen Y) comes from health care exp

Ah, sorry. I misread your post. At least in Australia, the really expensive 'contingent liability' (i.e. future tax burden on Gen Y) comes from health care expenditure, which tends to sky-rocket as one grows older. Might be different in the US given the more limited government expenditure on public health.