I don't think threatening your current employer about how in-disposable you are and how they'll have production outages if you leave shows you're a very good teammate/employee/team player.
If you ever find yourself as a single point of failure at a company, and you feel you're underpaid, screw being a "good team player"
Adopt a "fuck you, pay me" attitude and get what you're worth or get out.
"Good team player" is how companies manipulate you into getting more value out of you than they are paying you for.
Edit: this will not always work. And you might burn bridges. Be warned.
Edit2: Also dont actually say fuck you, that's internal monologue. Stay professional!
Agreed. Life's much too short to get screwed by a job for a long time.
As soon as a certain security clearance gets approved, they're in for one hell of a shock.
Absolutely they should be somewhere they're more valued, but should be patient while they work out how to do that.
How is this any different than the recent uprising of the r/antiwork movement?
I've got one person under me and have done for 3-5 years.
Most have enjoyed working under me (so I understand it), most resignations have been for bigger opportunities / bigger cities / bigger money (1 out of 4, and TBH I missed they wanted more money - this was my fault).
My current "report" seems very happy (though I expect them to leave soon, not for money but they are far more interested in another industry and tech challenges that come with it).
They could do infrastructure, kind off, not code - no chance (I like them as a person but they depend on me to teach them how to code)
Hire "younglings" (star-wars) is my remit.