They'll just do something similar to what some engineering managers do in the software industry. They'll tip off their cousin or friend of a friend of some opportunity (like needing to hire 10 engineers for a new initiative) and when they make money by acting on the information they reward the tipper with cars, vacations, homes, etc.

Sometimes managers will only hire through staffing agencies owned by family friends and get indirect kickbacks.

When I first heard about this my initial question was how do they not get caught when the assets are gifted or transferred to the manager's name. Turns out they don't actually transfer the assets to their name but they effectively own it through free usage.