[exabrial]

If the labor pool increases in relation to jobs, than yes, he's correct, it will depress wages, that's simple economics. However the blame doesn't lie with the immigrants: you shouldn't be working so simple a job it can be easily taken over by an unskilled worker and expect a decent wage.

[int_19h]

When you add an immigrant to the country, it's not just the labor pool that grows - it's also the demand (because every new resident needs housing, food and other services), and that demand translates to jobs.

[exabrial]

Exactly. I'm not sure why we're being down voted into oblivion, but this is exactly correct.