What would happen if we cut gold gain down?

So most people understand that the game progresses way to quickly, with 1-2 items being huge powerspikes. So what if to slow down progression, we lower gold gain down 1/4? Of what it is, or even 1/3.

Doing this would help exp focused champions rise, which generally are the scaling champs who want to have scaling items. It would in turn lessen the strenght of early game champs who scale more off items, like adc’s and some assassins. (Rip Shaco though).

Any thoughts or changes?