"Full Pension"? See: https://en.wikipedia.org/wiki/Congressional_pension
There is a widespread myth that members of Congress and Senators receive their salaries FOR LIFE... In fact, they have a very good pension plan but, it is the same as countless federal employees.
Our source is the same but we are relying on different passages. The Congressional pension available to Yoho is as I describe. It is part of the Federal Retirement System but is far more generous than the standard federal employee pension. Calling then “the same” is like calling a Honda Civic and a Rolls Phantom the same because they are both automobiles.