There’s merit to the idea if those over a certain age (TBD) are grandfathered. The original retirement age of 65 was set back when the lifespan average was 64. It’s currently 78.
SS has become much more than supplemental income for old folks. SSI benefits that were added make it defacto Welfare. People hide their wealth so they can receive SSI on top of their regular SS Benefit.
Jimmy Carter changed the law so elderly legal immigrants who paid nothing into the system can get benefits paid to them from the system.
SS was rigged from the get go. FDR knew a lot of people who paid in wouldn't see a dime, but it was a carrot on a stick.