The business-owner class benefits from the health system, because the business-owners are the gatekeepers of healthcare (typically, people get healthcare only through their employer). The worker class is less likely to benefit from the free part of the "free market" because their healthcare is tied to their employer; it's just harder to do anything except work a typical 9-to-5 for the benefit of a business-owner.
The healthcare industry also benefits because they get to suck up a large portion of the GDP; trillions of dollars.
So wages aren't only flat, but the wage growth that should have happened instead went into a corrupt system. Wages aren't honestly flat because of natural market forces, they are corruptly flat.