This really surprises me as a proposal. I would think, if this is a reaction to public anger, it would make more sense to DIScourage immigrants from seeking naturalization. After all, the government has more control over the lives of visa holders than citizens.
I was planning to naturalize (she says, staring way way off into the distant future and wincing at all the hurdles between here and there), but I can see how people would be flexed. And I don't get the point.