Not just that, but people tend to forget that by maximizing one’s earning potential they maximize the amount they can give to charity.
A friend of mine is very Christian and very smart, asked me how she could reconcile going from her charity job to a big financial services firm for a 60k a year raise. I reminded her that the firm she was going to had charitable matching, and that they would rather get 10k a year from her and replace her than have her work there another 5 years.
A very good example of why Michelle Obama’s advice just leads people down the primrose path. (Not to mention what it would do to society as a whole.)