Almost all of GOP’s “reforms” for social security start with people 50 or 45 years old at their inception. It’s a lot easier to get current reitrees to reduce benefits for future retirees if you assure them that their own benefits are safe. But I agree that SS/MC will still be around, even if the purchasing power of benefits erodes substantially. It’s easier, and more conservative, to plan without SS, though, and retirement is so important that it makes sense to have safety factors at every step.