Yea but the real answer is opportunity cost.
When it is a gun to your head between physical labor, or winning favor with the guy with the guns, it's an easy decision. In other words, they dont need money to motivate you because your opportunity cost is so miserable.
And even if they didn't pay for themselves, all an IT worker neess is a computer and internet connection.
Look at some of the most talented black hat hackers, Barnaby Jack was just a guy with no education hanging out on welfare with a computer. Sabu was just a drug dealer living in the projects. Jeremy Hammond was a PC repairman that liked to go to political protests. We're kidding ourselves that to be a good engineer (or anything for that matter) you need to somehow be "high class," have branded credentials, and come with an expensive salary.
(Those examples happen to be people with more latitute than most.)
Hacking apparently pays for itself and then some. I'm certain they're not paying them $150,000 a year plus 401K benefits.