Silverhawk is probably new in this industry, and does not know:
Decades ago, US ALPA established a certain criteria for work compensation.
They tied salary to gross weight/size of aircraft. Of course, factored by
hours flown and other variables.
The reason was: they tried to make the companies share with their pilots part of their productivity gained via A/C size .
Part of the industry went along with this criteria, making the cost of piloting a percentage of the product output, per aircraft, per hour flown.
Cheers..