That's the beauty of the current over-abundance of demand for devs. You fire bad bosses by quitting. Simply put, if you want to pick your best company, you have

That's the beauty of the current over-abundance of demand for devs. You fire bad bosses by quitting. Simply put, if you want to pick your best company, you have to be willing to find it. Similarly, if an employer wants to pick their best devs, they have to be willing to do things like not have bad bosses. In markets where demand is constrained, mobility may not apply, but neither do the benefits of cross-company unions.