Lol at the way some people seem to think shareholders are like some sort of regulatory body. Its just numbers on a screen.
Also, this proposal would pretty much only affect people earning over £300k, but the world seems to be full of people on probably a tenth of that who are horrified by the proposal. Media brainwashing at its best.
Of course we are. Say pay was limited to £300k and you had someone currently paid £500k. They're going to let their salary drop and get recompensed in other ways, which will drop the tax taken from that person by around £100k. It's bound to be middle earners who make up that shortfall.