I don't understand what you're saying here at all. Are you under the impression that money someone needs to live has something to do with compensation? Labor is a market like any other. A sales salary has nothing to do with how much a sales person needs to live but rather perceived value of a sales role.
In my personal experience, sales people tended to have higher salaries along with strong commission.
Maybe your comment is constrained by your idea that revenue is shared equally between engineers and sales people, but why would that be the case?
I was challenging the fact that, as you say : "Labor is a market like any other.". I don't think it is like that because behind each job there's a life.
Moreover, on the fact that engineers and sales persons should have the same salaries, yep that's what I think. I don't see why sales works should be more compensated. I understand that the way it is compensated (bonus for sales) is the way it works, but in the end, I don't see why it should pay more than engineering (here I consider a context where the sales person and the engineer are both employees).
The two roles are equally important to me, just different skills.
In my personal experience, sales people tended to have higher salaries along with strong commission.
Maybe your comment is constrained by your idea that revenue is shared equally between engineers and sales people, but why would that be the case?