It's more in favor of the employee than a lot of people admit. The problem isn't the negotiating power it's that there's so much noise when you're switching companies it's impractical.

Unions could only make that worse.

"It's more in favor of the employee than a lot of people admit."

But is it equal? It is hard to scientifically to prove, but it sure seems like companies have way more leverage than a lone developer.

I am not trying to antagonize you, btw, I am just seeing where you come from in your points.