I quite agree with this, and the sad thing is, there is countless evidence to this effect out there in the form of peer-reviewed research. I know because I've written about it a lot myself. It's seldom a narrative that gets wider attention, however. I touched on this in an earlier post about the life sciences sector, but pretty much every sector where we might regard ourselves as a success internationally wants a very liberal immigration system because their lifeblood is talent, but we have seemingly evolved into this bizarre situation where the Tory government actively go out of their way to not only make things harder for our leading industries but often to verbally do them down as somehow anti-British because they represent the other side in so-called culture wars. It's utterly mental.
Might be of interest if you have an FT subscription