While they were much better off than the average person. The Three Stooges during their 23 years with Colombia Pictures were chronically underpaid and never received a pay increase, because the head of the studio convinced them that they were unpopular with audiences. The Stooges did all their work before the Equity Actors' Strike. This dispute lasted from November 1961 to April 1962, after which actors received residual payments each time their work was shown on television.
I don't think that they made very much money at all.