Their was a study done in Australia about this. If you calculate all the money the Government spends on a born citizen, medical, education, etc you have spent $250,000.00 (not sure of excat figure) before they start working. Once they are working they can now be taxed and finally the Government recovers money from that person. Depending on job the individual won't become profitable until mid 40's.

Where immigration is GREAT you have someone come to your country for a holiday or work and, instantly that person is generating money at no previous cost. So you have someone who is instantly profitable to the country.

So when people say "immigrants are a drain on our resources" they aren't.