I care. If they increase our debt or just start printing extra money, they have fulfilled their obligation to SS while screwing the rest of our economy pretty hard.
> has very little meaning except taking part of the money out of circulation for no reason
Very little meaning except having the government follow rules of financial discipline that any financial advisor would advise individuals and businesses to follow. If you want to save after-tax money for retirement, separate it out from the rest of your disposable income. Keep separate accounts, separate records, etc. Otherwise, you'll blur the line between your different monetary purposes and it's doubtful you'll mean your savings goals.
It's about discipline and clarity to the American public. Sure, a dollar would be a dollar if the government were responsible enough to follow sound money management principles... but when have they ever done that?