Notice they’re building castles too. Look deeper you can even find insane sounding manifestos describing feudal style martial-loyalty oaths.

Reference for techno-neo-feudal loyalty oath please?

And the lords of the land fly their jets while asking the subjects to reduce their climate footprint.

Feudal lords, at least, had the wisdom to build their castles in the middle of their protected fiefdoms. In times of social upheaval, a doomsday bunker just becomes a particularly juicy oyster to shuck.

How will they protect themselves from their own security forces?

Ah, that's the billion-dollar question. In most of the revolutions, the army, not the citizenry, was the one who went against the ruler. For example that's why Putin kept his army weakened and ineffective and had Wagner force(which still tried to revolt).

They're hoping AI and robotics will be capable of handling security by that time.

Treat them well enough, and they become the new middle class. Not rich, but not poor enough to revolt.