You bring up a good point and sadly one I constantly overlook; the un-funded liabilities looming in our future. I have seen lots of numbers bantered about as to what that sum actually is. Regardless, it is too much for us to sustain and realistically pay for under our current structure.
The Right, to win elections, only need do ONE thing each and every election cycle:
Send a ‘bill’ to each household w/ a break-down of cost(s). SPECIFICALLY state the $$ for EACH member of the family (IE: If you have children, under the age of 14, their ‘obligation’ is $X, before they earn penny ONE.)
Course, one would need a party that wants to ACTUALLY reduce govt, not just be the ones in ‘power’ to do...nothing. Calling attention, as above, is NOT in D.C.s interest.