Well, how to stop it? It seems that we, as a country, believe that voluntary charity and within-family gifts which society has used for millions of years to support the old and indigent are no longer suitable, despite the wealth we have here. We believe it is proper to use the police power of government to take the personal property of some citizens to support others. Not at a subsistence level, but at a level of comfort that the vast majority of those on earth don't experience, and never have.
If that's what we are facing (and we are), then I'm all in favor of taxing people more to pay for their own retirement (under government's heavy hand) so I don't have to do it. At least with SS there's some modest link between what you put in and what you get out, and they aren't taxing dividends and interest payments to support it. Yet.