I agree that high turnover is a real constraint. That’s why the answer isn’t “10 years of apprenticeship” but designing scaffolds that combine learning with contribution in a shorter timeframe. Things like short rotations, micro-credentials, or mentorship stipends let juniors add value while they’re still on the job. Even if they leave after a few years, the investment isn’t wasted — both sides still capture meaningful returns.

Maybe this is unpopular, but what if 5/10-year long contracts started getting traction?

I guess you'd need to trust the company, which is hard to come by.

Interesting thought — long-term contracts could indeed align incentives for growth and stability. The challenge, as you note, is trust: few employees or companies are willing to bind themselves for 5–10 years in today’s fluid market.

That’s why governance frameworks (whether in labor or in AI) matter: they provide external guarantees of trust where bilateral promises may not hold.