I'm totally not against people coming in to the country - legally. One of my first tech jobs was at a company that sponsored a number of Polish and Czech engineers. They were all effectively captive - they were paid a barely livable wage (relative to US-born people doing the same job) but couldn't easily go out and take another job due to immigration status. But that meant the company 'saved' so much, and could use it to help keep other wages in line - 'you're already paid $x more than person Y!' sort of thing.