Don't take it if you don't want to - it's not compulsory.
Let me explain: My idea is to free up a significant amount of money—that SS sends to those who don’t need it—thus making that money available to those who do. If I personally simply decide not to “take it” there wouldn’t be much money available to others. It’s a matter of scale. Capeesh?
I haven't counted the number of times it has been mentioned in this thread that means testing is not practical at all - but means testing would be the only way to administratively address the problem of people saving SS payments instead of spending them.
However, the overwhelming majority of Americans is not wealthy enough to be able to retire without SS, so the problem is not at all quantitatively significant.
Basically, your argument rests on moral reasoning, i.e. people who do not need SS should not get it because they do not have a need for them.
That is exactly the old, and many times debunked, idea of people mooching off of welfare, a trope exploited since the times of Reagan (welfare queens and all) designed to create resentment in people who have bought into the zero-sum idea of the economy.
SS is another animal though, it is actually a government sponsored insurance scheme in which participants acquire entitlements by virtue of buying into the scheme over time with payouts related to contributions to a large degree.
Introducing means testing of some sort, beyond bend points and progressive taxation (redistributive features that are not unusual at all), is inappropriate and excessively expensive.
Even in the case of actual welfare, which SS is not, policing welfare fraud is not cost effective because the level is rather low and welfare fraud does not impact wealth redistribution effects as the funds illegally obtained are most likely spent, that is re-injected into the economy.
And no, people should not forego SS payments they do not "need" but rather donate them to a charity that disburses funds on an as-we-go basis in order to maximize redistributive effects on the business cycle.
But if you do not want to take SS benefits - no problem, but don't try to sell it as a solution to some problem you are imagining and that others should do the same
Now corporate welfare is an entirely different subject because any payments or tax credits extended to corporations not in distress are locked into the business cycle, thus exacerbating length and depth of economic downturns.
In a nutshell, it all harks back to an ideology that divides people into those who deserve wealth and others who do not and that makes political use of vilification of those who are deemed undeserving.
You got that, right?