[jarfil]

Increased supply doesn't drive prices down on its own. Prices change as the ratio of supply:demand diverges from 1:1.

Immigrants not only bring in labor supply, but also product demand. So even if they aren't investors looking to hire people, the proper question should be whether they bring in more supply than demand, or whether they don't.

I'd say that immigrants who send money abroad, tip the balance towards higher supply, while those who don't, are actually suply-demand neutral (they spend their money where they earn it). So removing citizenship from those born, raised and consuming, is just bullshit.

As for why low-end rates have gone down... check out income inequality, you might find that the top-end rates have gone up by the same amount. Either that, or the economy is tanking (but it isn't).