Legal Immigrants: Backbone of Economy?

I'll be back as soon as I have done some research.

I think that there's a case to be made that Legal Immigrants -- those who become citizens, those who only ever become Permanent Resident Aliens, and various work-visa and researcher-visa types -- are the Backbone of Montgomery's Economy.

As soon as I find the supporting statistics, I'll post them.

I know for a fact that there are a lot of persons of foreign origin who are doctors and scientists, not to mention information technology workers.