[OhNoMyqueen]

Bargaining power is mainly dependant on offer and demand; it can be low, or it can be high, depending on how valuable you are to the company. Pay transparency will simply increase the number of employees who will try to bargain. I guess that if you're not valuable enough that could backfire for everyone. If you do are valuable the company will just need to pay.

[stuaxo]

The company is made up of people, and people have biases in who they value hence these inequalities.