This isn't about efficiency, it's about attacking science as a tool for evaluating truth. It's a way to discredit the authority of expertise and shape the course of research with selective funding and demonization.
Elon Musk: now singlehandedly responsible for the US falling further behind China in innovation and research (for the record, fuck the CCP).
I seriously hope the UK takes advantage and offers visas and funding for the research. We've already got a good research sector though it took a hit from Brexit. Taking in these US scientists, even if it's only for four years, would accelerate the UK's growth, suck it Yanks!
Especially if you'd add up all the inefficiencies already introduced in the name of efficiency. All those grant proposals, superfluous fluff articles to bump impact factors, etc. are all required overhead to game a system designed to seem efficient.