I think an unspoken reason that both sides want open immigration is that they desperately need a new tax base to replace the boomers who are quickly transitioning from payors to payees in social security, Medicare, and other government services.Millennials, GenXYZ, and everyone else can't replace the loss of the boomers in the workforce, and politicians are panicking over the collapse of these systems on their watch after all their promises, and the impact it will have on their future fortunes.
-PJ
Every Ponzi scheme fails because it's unsustainable.