You are talking about game balance. That is the GMs task. However...
- Look at the DMs to see how pure Vilani pure your bloodline is. Except for the government type, they are all geographical. So, basically it is very rare to be pure Vilani you were not born in the right place.
- Enforce the cultural stereotype in character generation
- The re-enlistment rolls are not subject to DMs. Enforce it, no mercy. If you are using Mongoose 1st Ed, you have to roll higher than the number of terms served or you are out
- Enforce the cultural stereotype during play. "This is not my job, I don't think I should be doing this."
Why not then? Or is your player a munchkin?
Citing Mongoose rules in support of the OTU is a
BAD IDEA... many things are not congruent with "real editions"...
Climbing reenlistment and promotion linked to reenlistment being major disconnects.
In CT, MT, TNE, T4, and T20, reenlistment is a flat number, never changes. In MT, brownie points can be earned and used on reenlistments, so it's quite possible to push a few extra enlistments.
The REAL limiter is the fact that, in MT, you cannot have more total levels than the sum of Intelligence and Education. Which, typically, will be in the above 12 range for long-lived characters... so at the end of generation, when you trim back, a lot of the skills are at level 0... which is a better thing in MT than in MGT, as it's saving a 4 point shift instead of a 3 point one, and slightly lower TN's by difficulty, too. It's quite possible to have a vilani character using advanced CGen with most of the skill list... at level 0. Their specialty will be stupidly high; MT has a max DM from (Stat/5 round down)+Skill of DM+8. But the vilani character has to keep buying it... so it gets nerfed down to level 5,6,7,or 8 (depending upon current att) by sane players.
They don't dominate because they suck at everything except their specialty. Still, you don't want to meet a Vilani brawling specialist. (Had a 10 term Merchant who was FFFEE2, Brawling 8, Gunnery - Beam 1, Gunnery Missile 1, Streetwise 1, Rifleman 1.)
Sure, he could break your neck easily, and sold off his 10 surplus weapons (24 MOB rolls)... but he was pretty worthless at anything else. A whole party of one-trick ponies...
I'd have to check to see if they can career hop.