Who does the growing? The Government? No. Employers and workers do the growing. The best way of enabling them to automatically get their rightful proceeds is to stop taxing them and not, as is suggested by the poisonous phrase, have a "beneficent" Government decide how much and when such proceeds are to be "shared" after they have taken their slice. It is collectivism, and being the Government with its enforcement, of the involuntary kind.
I doubt the Tories will listen hard enough. Regardless, an alternative in the wings.