There is a scheduled date (every 2 weeks for my paycheck, every 6 months for my RSUs) where I will be given some <money> dollars if I am still working here. I will pay income tax on that income. One is in the form of money and the other is in the form of stocks, but really you should sell those stocks and buy something more stable and not tied to your employer.
If you quit or get fired, you won't get your paychecks on the days you expected to in the future. Nor will you get your RSU vests. Same thing. Just bigger numbers and lower frequency for one of them, with some additional variability in amounts.
They aren't golden handcuffs. They aren't job security or threats. They're just pay to keep you working, like anything else.
edit: I lost a word or two.