I'm surprised to read such an absurdly simplistic idea from such a celebrated "smart man". Note how he glosses over, entirely, any possible unintended (yet certainly foreseeable) impacts on the economy, infrastructure, culture, and societal stability -- somehow a slowly recovering (and still weak) economy will make any concerns moot.<p>And, what kind of immigrants? Any? Really cheap labor forces that will drive down wages? Mediocre talent? Maybe just anybody? If he wants to make a proposal like this, he should elaborate a bit. It reads like a late night "brain fart".<p>Overall, it sounds like he's all for anything to make _his_ generations' retirement easy...too bad for the generations to follow.