You realize even in itself thats a bad thing, right? If you set aside the xenophobia, you'll find most economists find immigration to be a positive thing for an economy. So its not really in the US' interest to reduce that incentive.
You do realise that a growth based economy has to fail eventually, don't you? most economists don't seem to, or don't care (as they might be long dead by the time it happens)
Citation needed.
Thats probably the least-accurate thing I've ever heard all night. First, no. They don't, and people have been looking for evidence of that exact claim for centuries. Good luck finding compelling evidence for it.
In fact, does the fact that economists, the people who specifically study this issue, disagree with you seem even remotely odd to you? Look, we all know you're a smart guy, but when you pit yourself against basically the entirety of economic theory, maybe you're letting your ego get a little out of control.
And Jesus, you think the fact they'll be dead "when it happens" colors their views? I'm not even sure how to respond to that. Do astronomers sort of shrug when they discover new stellar bodies because they'll be dead when we can ever use that knowledge?
In short, no. No, no, no, no. Economic growth has bad consequences and it has good consequences, but it certainly is not structurally insolvent in any way. You're misinterpreting whatever you've read--I'm sure you're basing this off of something, however maimed it's message has been.
And even if that was true, it has nothing to do with immigration because immigrants dont affect the structure of the economy, which is what you're referring to.