alt Hacker NewsI would encourage you to actually read up about the hoops that people with H-1Bs have to jump through just to stay in the country. It is a demeaning and abusive process, and not usually one that people engage in frivolously.
Additionally, you can already today legally switch jobs as an H-1B, but it is a process that gives undue amounts of power to the employer, which makes switching difficult. Finally, regarding switching fields, it's not that easy. You have to show that your new field is related to your degree and experience.
So please, instead of making up imaginary bogeymen, learn more about the immigration system.
I never said it should be as difficult as it is, which you seem to imply that I did. I only said meant to say the system shouldn't be too easy, either.