I agree with your sentiment, but there is no way we can cut off immigration completely. If we go back to the 195,000 a year during the period 1921 to 1970, we can achieve what you want.
I expect that what is possible is primarily a political issue; I'll take whatever we can get. I am certain of only one thing: if we don't stop the flood and reverse the cultural tide soon, we will lose our country.