Surrendering our nation to illegal immigration hardly seems like 'keeping afloat.' It seems more like jumping overboard.
Illegal immigrants can have a child in the US, and because of the 14th amendment, he/she automatically becomes a US citizen, entitled to all welfare benefits.
How do high welfare rolls help a nation state? If one nation has a hundred million productive citizens, and another nation has a hundred million productive citizens and two hundred million non-productive citizens, which nation is a superpower and which nation is an economic basket case?
The non-illegal-immigrant demographic trend in this country was leaving liberals behind, because conservatives have children and liberals don't. So the liberals commandeered the public schools, to indoctorinate the conservative children. So conservatives took their children out of public schools. So liberals realized the only way they could continue to control elections is to open up the borders to illegal immigrants and allow them and their children to vote.
You think this country will be around in 2025? I think there will be a country located on the continent of North America by the name of 'The United States of America,' but it won't be the United States of America.