Your grandkids won't be paying for anything, just like your federal taxes don't pay for anything. The federal government pays for it, without a dime from you or anyone else. All it takes is an act of congress. They pay for medicare for all same way they pay for war, with an appropriation from Congress. Your tax dollars don't pay for anything. The sole purpose of Federal taxes do is make you use US currency. #learnMMT . If you don't understand how our economy works you will keep believing the lie we can't have the things we have a right to under the Constitution. Congress are the ones to blame, because the power to give us what we are entitled to is in their hands.