Why do the power dynamics have to be the same? Are you suggesting that two parties cannot have a consensual relationship unless they have the same amount of power? Why not?

And how do you even measure 'power'?

Because it will be inevitable that someone with less power will enter into the relationship out of compulsion due to (real or perceived) no other choice, and not because they want to.

The McDonald's CEO is gone because of a consensual relationship where the power dynamics were unbalanced

in employment, yes, I am suggesting that, and that the basis behind at-will employment is flawed, there are plenty of ways to allow for the paid-person to exit a contract whenever they want without it meaning the company fires them whenever they want for any reason.

in other contexts, no, I am not suggesting that, but there are some fringes that try

Why is employment special? Why is a person more entitled to employment than any other sort of relationship (which you seem to agree ought to be consensual)?

> thats the default when the power dynamics are the exact same

That's impossible to codify at any reasonable level.