Pensions and taxes are the main reasons governments want immigrants because without more people paying in they can’t pay out (without highly unpopular moves like additionally heavily taxing retirees, consumers and businesses)

As mentioned elsewhere, there are a lot of jobs that 3rd+ generation people won’t do, at least for minimum wage.

It’s been proven time and again that migrants are more law abiding and less violent, pay more in taxes than they extract, plus have on average a better work ethic. They also tend to be over qualified for the jobs they accept.

The reasons against almost always come down to racism and “replacement” fears.

It’s funny how in Canada we never faced any suspicion despite our obviously non Canadian accent. Strange huh?