Interesting thread with lots of views and points. As a landlord, I've seen a lot of the perfectly able-bodied folks who were "disabled" living off the system, kind of always irked me.
Then there's the whole discussion of when to start taking SS, when you first hit 62, 67, 70? If you start taking it at 62, you have 8 years of income before folks taking it at 70. Taking it at 70 pays out more. If you live long enough, waiting always puts more money in your pocket. The guy who starts taking SS at 62 hits the breakeven point at around 81 years old, after that it's a benefit to wait longer before collecting (as an exercise to the student, you can plot this out). But... looking at folks in their 80's, they aren't really able-bodied running all over the place and traveling, so why not collect early while you can enjoy it? Putting a 25% discount at the year 2035 due to insolvency, moves the cross over point out a couple of years, around 83 years old before you are ahead money wise.
I always felt I'd rather have the money to do with it what I wanted, but looking back at how much I paid into the system (I was a high wage earner), it's surprising little compared to what you can collect living a longer life; you'll collect far more than paid in.
As pointed out FDR put SS in place, not as a retirement system, but as a means to take care of society after what had happened during the great depression.
From the Google Machine:
"The Social Security Act was created to address economic security in a modern industrialized society, and to protect Americans from poverty, unemployment, and the burdens of widows and fatherless children. The Great Depression was the event that finally convinced Americans to adopt a social insurance system "
"Social insurance, as conceived by President Roosevelt, would address the permanent problem of economic security for the elderly by creating a work-related, contributory system in which workers would provide for their own future economic security through taxes paid while employed. "