1) The original intent of SS is to provide wage earners a secure retirement. The reason for this act was because most low wage earners had little knowledge of investment for the future. Remember, this was during the days where everyone, even little children, had a savings account at a bank. These savings, at the time, were not covered by FICA and there were frequent bank robbers, as well as bank failures. A regulation board was set up to invest the funds of wage earners and, upon retirement, these folks expected to receive, monthly, an amount equal to their contributions and investment by SS. Over time, Congress found itself in need of funds and saw a large source of funds sitting in SS's control and through their actions allowed themself to borrow (IOU) funds that through the years were never paid-in-full. Also, Congress through its actions made it possible for non-wage earners whom had not contributed to SS to receive benefits from SS. I call this a legal back-door stupid action the general public turn a blind eye to.
2) Medicare, just like SS, originally was set up for those wage earners whom contribute to SS to have a health plan for their retirement years. In order to receive benefits from Medicare, folks first had to contribute from their wages and to also qualify fri retirement benefits under SS regulations. Again, Congress has "watered doreen" the requirements to receive benefits from Medicare to folks who have not yet qualified to receive standard SS retirement benefits nor have they paid into the system.
The question concerns can these two programs ever return to solvent. First, they are rapidly approaching insolvency and continue actions of todays management will certainly destroy both. So the only possible way to assure solvency of both is to return to the original order and to collect those IOUs at a max. dollar value.