It sounds so profoundly anti-capitalist - if the knowledge of certain strategy is so important, the employee should be retained by paying them more and giving them better perks instead of enforced labor contract.
But I think it is slightly silly reading your statements knowing that the individuals in that hyper specific industry are top earners already and educated to know what they are signing up for.
Only if you have an extremely vague and poorly defined definition of "capitalist", which I don't blame you, most people are ignorant, and we live in a society that prefers to throw out opinions like they're reality.
Otherwise, the biggest firms (e.g. Millenium, Citadel) could simply "buy out" any already-successful researcher, offering them more money (either in terms of % of profit, or - more importantly as it scales with size (for many strategies) - offering more capital to trade with.
This particular suggestion breaks down fast when you have multiple employees that need to collaborate. If you have a million dollar strategy, you can pay half a million to an employee as a retention bonus. But you can't pay half a million each to 8 employees.