I don't see any problem with moving Social Security to 80. When it was established at age 65, life expectancy was 59. You worked until you died.
I'll "retire" from my job next year, but I'll simply move into another line of work.
What about people who do heavy manual labor? Most wouldn't last past seventy, much less eighty.
I'd like to see Bailout Boy Benmosche leave Croatia and do construction work or farm labor to show us peons how it's done.