Not really on topic of the new Arizona law, but I don't think there is a single economic theory which proves that illegal immigration hurts the economy.
Some people lose jobs, but overall, the country benefits.
There are plenty of people who've tried to come up with a solid theory to disprove that, but none to (my knowledge) have been able to produce a theory without flaws.
I don't support breaking the immigration law, but the whole debate about "them taking our jobs" doesn't account for the fact that the size of the economy (and more importantly the velocity of money) is increasing because of the illegal migrant workers. That creates a lot more possibilities for everyone else, including the people who got laid off.
I really doubt that is true. There are lots of companies making record profits but unemployment is high and lots of good people dont have fulltime work.
Oil Companies Record Profits the last few years
Banks Record Profits the last few years.
And if you have ever lived in a place with a high percentage of migrant workers you know the money does not get back into the system very easily. They hoard it, they Western union it to family back home and they are likely to spend it on basics.
I think it is fairly simple to see that if they lose their jobs and get deported, the companies will have to hire legal workers at a reasonable rate, making jobs for the next step up in the system have less cheap applicants, raising the conditions and wages for that level. And on and on up the chain.
Yes some lower paid jobs wages will raise benefits. Costs may go up a bit.
I never thought that the lower under $20 an hour jobs would be at risk from illegal aliens when I was a kid. I mean if you are illegal you leave.
If it is absolutely necessary for some industries they petition some amnesty. And if none is given industries like farming will have to modernize.
Another thing America is good at. Bonus.