Social Security is not part of the budget and doesn’t contribute to the deficit or the current federal debt. It currently pays its own way, from money raised by the payroll tax, and will do so for 16 more years. Even then, when the payroll taxes and trust fund might run short to pay 100 percent of benefits, it would require a legal change for general fund money to be used to pay benefits.
Social security is included in every budget, though it is “self-funding” and for years the excess was put into the general fund and “IOUs” are given to the social security trust fund.
Of course that’s equivalent to someone starting a college fund and putting money into a cookie jar on top of their refrigerator, then at the end of each month taking the money our and spending it on their bills, then placing a paper IOU to replace the money. Once the child is old enough to go to college your just going to have a bunch of paper with IOU written on it and will either have to borrow the money for college, sell your possessions, or work a ton of overtime to replace it.