An anonymous reader writes "This being college graduation season, the insights provided by commencement speakers should be familiar by now: find work in a field you're passionate about, don't underestimate your own abilities, aim high, learn to communicate and collaborate with others, give something back to your community. Billionaire Mike Bloomberg, whose current job is Mayor of New York City, evidently decided to break the mold by advising less academically adept youngsters to consider a career in plumbing. High wages, constant demand, no offshore competition. 'Compare a plumber to going to Harvard College — being a plumber, actually for the average person, probably would be a better deal'. Ouch! And hey, like a lawyer, a plumber can always dabble in politics."