Flat salaries may fix this? You basically join at the same bracket publicly. No performance bonuses and all salaries increases are directly based on years put in. Everyone joins with the same options across the board. For each male hired there must be a female hired. No roles. Everyone has the same title: "Engineer". Off sites are strictly prohibited. Is this what the lawyers want?
This is how Japan worked for a long while; now it's moving toward a more meritocratic approach with performance bonuses and raises because the fact of the matter is that it sucks for people who work hard to be paid the same as the guy who comes in 9-5 and does average work.