[hbbio]

I have to agree with many things you say, but I can't figure out why "high immigration rates" may be a problem.

If you imagine a country as a giant shop, the more customers the best.

[fchollet]

Immigration can be a huge force for growth and prosperity as much as it can be destructive. You can think of a country as a company, and of immigration as recruitment. Recruitment will make, or kill, a company.

[bsaul]

it is a good thing when the country's growing. It creates additional tensions in the case of recession.