No, I read what you wrote and I meant what I said. Let me explain again: people are willing to do anything, even jobs they dislike, just to get a visa. That doesn't mean they'll want keep doing that shitty job once they get the visa and can start looking for workarounds. Otherwise there wouldn't be a shortage of staff in those sectors if all workers would stick around for long.
> They come here willing to do those jobs.
Someone willing to do a job means you don't need to force them to do it. After all, they aren't slaves.