In California, the minimum wage is $7.50 per hour.
In Azeroth, my Warlock has almost 151 days /played. That equates to 3,624 hours at my computer, casting Shadow Bolts, Immolates, DoT'ing the hell out of everything, and what have you.
Had I picked up a 2nd job and worked those hours, I would have had an extra $27,180 of gross income saved up over the past year and a half, at the very minimum. That's TWENTY-SEVEN THOUSAND ONE HUNDRED EIGHTY DOLLARS of extra cash. I know of people who have kids they need to plan financial security for, but yet still play this like it's their duty.
Just remember, all. This is a game. Not your life.
Take care of business. Then play. =)