It's a change in mindset, that turns a 'tell me what to do' into seeing options everywhere you look.
The mind set has to do with equality before the law. Is anyone above the law? Ask yourself this question, honestly, and listen to the answer. I mean if you look at a society... doesn't have to be the one you live in. Is everyone de facto equal before the law? Ask someone else's employer: 'If your employee says, thanks for the offer but I will pay anyone I owe, that 20%, on my own.... what would you do?'
You have to believe in equality before the law, to understand what power you have to act.
If nobody is allowed to take a deduction from what you legitimately earned... that would be equality before the law.
If some are allowed, and not others... that is inequality before the law.
If you already accept that that you live in a society dogged with this problem, well, now ask: 'what can I do about that?'
p.s. bear in mind, if the above mindset is new to you, you're not looking for a light-switch, you're looking to escape contributing to the problem ('Learn to walk before you can run').