30 years ago, to the nearest decade. That was the change in Social Security policies that raised my retirement age and the tax rate that I pay into the system. My standard retirement age is just after Medicare "exhausts," that is runs out of accumulated funds to pay full benefits to people who have been paying into the system for their entire working lives.
The wage base will need to be adjusted to reflect these changes. The last time it was changed was 20 years ago under Reagan.