I don't think that hiring off-worlders and training locals for higher tech maintenance is anywhere near having a space force where all are severely higher tech than the local TL.
No. But a few of these trained loacals will, in fact, use this high tech training to their advantage and move up the ladder, getting more and more training, get wanderlust, muster out, and become travellers with a high TL capability than the people around them.
Because that's is the point of this exercise, yes? To see how a traveller might come into existence from a low Tech world? Not how
everyone who might work for a hired on high tech force might become facile in all high tech equipment?
After all, the entire point of the prior service rules (as stated clearly in the Book 1 text, and I assume the other two editions of the Basic
Traveller rules) is to give a PC the experience needed to "deal with the adventuring universe." By definition then a Player Character generated with prior service
does muster out with "the expertise necessary for the active life." That was Miller's point, right?
If I'm wrong about the point of this exercise being about producing travellers, I apologize.
TL also means what is available locally.
Yes. Absolutely. That's my point. Hired-in military gear and training available only to the planet's ruling government isnt' available locally. It was imported.
But a local isn't at some sort of genetic disadvantage or doomed to misunderstanding because of how he spent the first decade and a half of his life. Again, the point made above bears on this: The entire point of prior service is bring the PC up to snuff for "the adventuring universe." Not everyone from the planet will gain the needed expertise, not everyone who serves alongside the PC will gain the needed expertise, but the PC will... by
definition. The wonderful game to play within that is to say, "What cool things happened to this guy or gal during their prior service to let them move from their humble beginnings to become a traveller?"
****
Now, it occurs to me I have been digging at the fundamental point of
your fun. Because I honestly don't see why you are making this so
complicated. The whole Personal Tech Level thing is... well, I don't get it at all. But you do. So if I'm getting in the way of your fun, or being annoying, let me know. Because I'm looking at what you're thinking through and thinking, "Dude, why are you making this so
hard when the game, in its blunt wisdom, doesn't need you to solve a problem... because there is not problem." But if you want to
make a problem and solve, that's cool and I'll be quiet.