> How are the employer's and employee's interests aligned exactly?

If there was no shared interest, whey would employees and employers ever work together in the first place?

I’m not as extreme as the parent, but think about it. Consider a small construction company where one (highly rational, borderline sociopathic) man manages a crew of workmen. The interests of the manager are those which maximize his profit on each house his crew builds, which includes paying the crew as little as he can get away with. The interests of the workers are oriented around securing the money they need to live. The only shared interest that I can identify is that the manager and the workers both have a desire to move money from the person building a home to their hands. The problem is that this money transfer is a zero sum game, so even then their interests are diametrically opposed. There are many employer employee relationships that don’t look this way, but I think it’s largely because the relationship evolves away from rational self interest for a myriad of reasons, such as if both employer and employee believe their work is valuable regardless of the money.

Thought about it. All I gather is that there might be some slight disagreement in the exact distribution of promised future value, but that is minor detail. The people involved are still aligned generally, working towards a common goal.

But this confuses their individual interests with their behavior on a broader level. The house construction is completely irrelevant to the interests of the workers, but they still construct the house. I’m disagreeing with your derivation of interest from apparent behavior, because working on something is quite different from believing in it.