And perhaps give Clans an enlisted-like pay scale? They're frugal.
I envision the Clans military modelled after the early Soviet military -Everybody had the same rank and pay, but only a few people had job descriptions, like Platoon Commander, or Company Commander, to reflect their actual duties and role in command structure. That system was revamped after Stalin's purges but it took until the middle of WW2 to finalize the ranking system they finally adopted.
As a GM, I pondered over the pay system and its rationale. I was a union representative at the time in a FAA facility and seniority was among employees always a heavily debated issue, as seniority determined who got priority on shift selected, vacation time, etc., and some members would almost get violent over how seniority was determined. It was a combination of years in federal service, facility time and qualification time, with the same handful of people getting the top slots, no matter what method of calculation we used. It didn't matter to me so I left it up to the membership to vote on the issue.
As a veteran and historian, I applied Army skills testing criteria and what I knew about Medieval guilds to create a pay scale that made sense to me. Army skills testing was based closer to what medieval guilds used as a criteria for pay: An Apprentice should accomplish a number of tasks at a demonstrable level of expertise, and so on, up to the rank of Master.
I applied the above ratings to characters in a campaign and the players who cared about rank and pay weren't happy, as they believed that only gunnery/pilot makes a Mechwarrior. I even wrote up a fanfic based on a RP session where one of the "Gods of the battlefield" applied for a mercenary position wholly based upon his G/P skills. It's been years since I ran the campaign but I shall try to find the details of the pay scales I used.
BTW, current union pay scales are based on multiples of government-set Minimum Wage laws, modified by employment time.