Nobody is going to pay much of anything off. We'll just be paying the interest and so will they. As long as paying the interest is cheaper than actually paying off the debt there's little incentive to pay off the debt.
Yes except if we just keep borrowing and not paying it off, each generation gets to service all the debt from previous generations on top of their own. Do you think it would be right for you to be servicing debt that paid for your great great grand parent's social programs and every generation in between?