I figure an entitlement is simply something to which one is entitled. An annuity, an insurance payment, SS, a tax refund, even welfare. The rules are out there for whatever and if they favor you with payments, it's an entitlement. Somehow the term became a negative.
I could get back more in SS than I paid into it, unadjusted for inflation it's probable if I live long enough. I figured I was paying into it so my parents would draw their share.