I am not understanding this. And what are you living on while you invest your SS check?
Also, yes, the government can change the rules, but more than likely people of ages over FRA will be grandfathered in anyway. Of course, who knows?
Funny how many people with insurance annuities aren't bothered about handing over a ton of money to the insurance companies and waiting 10, 20 or 30 years to get their money each month. Yet they worry they won't get their SS money back. It's the same concept people.
This said, everyone has to do what they have to do. If you need the money, take it early. If you don't need the money, take it early and invest it and - heaven forbid- spend it or gift it!. If you don't need it presently, but will need it in the future, look at your individual situation, taxes, medical expenses, best guess on , etc. and deal with it from that perspective.
There are a lot of factors to consider. And actually several of them could work for the same individuals. There are lots of options and just a matter of preference in many cases. Whatever the decision, it is the right one.
If you drop dead before collecting, well......people also die in their 50's, 40's, 30's and younger. They don't get their money back either.