Which is all subjective. What "you" consider in the best interest of "our" standard of living might not be what "I" consider in "our" best interest.
Uh no, a standard of living viewed within the context of the traditional American "dream" is very objective. However, you are entitled to your interpretation.
Again, how many immigrants do we let in yearly before we become another India or Bangeledesh, with the the poverty and crime associated with dense population? 1,000,000? 15,000,000? 25,000,000? 80,000,000? 150,000,000? 300,000,000? Pick a number anywhere or in between.