I've never understood why one isn't allowed to work while applying for change of status . It's the most corrupt arse-backwards system which leads to the existence of schools like this. You only are given a provisional work permit after getting deep into the application process, but not before you've already spent thousands of dollars in legal and application fees that you're not allowed to earn while you apply. "Hey, legal immigrant wannabe, wanna do things the right way and become a permanent resident/U.S. citizen? Cool. Pay our corrupt immigration lawyers a shit tonne of money and apply for our expensive, drawn out, chaotic paperwork-heavy process, while not being able to work, and we'll get back to you at some point in the far future. Hope you have enough money saved up to feed and house yourself in the meantime, 'cos this could take a while. And nope you can't work till we approve your application. See you in 6 months! Or more if you make a paperwork error and have to start over or provide some silly document we forgot to tell you about. And have to pay some shitty lawyer to help you appeal our rejection letter. Welcome to 'Murica." So yeah, not surprisingly, supply, meet demand.