Um.. This is one of those problems that’s really nonsense. All employees should be compensated at market rates. Otherwise if you are lower, they won’t stay, if they are over, your competition will eat you.
Compensation is not equitable WITHIN A COMPANY. It is equitable across ALL COMPANIES.
Do not fall into the trap of confusing the ‘fiarness’ of a family, with the alliance of people that work together in a company.
https://www.quora.com/Have-any-corporations-embraced-equitable-or-just-compensation-models