Short it depends. Essentially, based on your numbers, the Peace Corps readjustment allowance has gone up 300% (or 3 times). The inlfation calculator at inflationdata.com says that since 1961 prices have inflated over 500%. So by that measure, the Peace corps has not kept up. However, if you calculate inflation from 1976 (the last time the Peace Corps gave $75), then the rate has only been about 260%. This all means that the you are getting more money today in "real dollars" than if you were coming out in March of 1976 but less than if you were coming out in Jan of 1961.