South Korea is an even deeper oligarchy than the US. All Yoon has to do is secure the majority of that oligarchy's opinion and they will essentially enforce the political line through the chaebols (family owned megacorps) they control. Chaebols have immense power over normal people because they're effectively the only way to be upper-middle/middle class in Korea. Chaebol employment practices are obscene to the point where you can be not hired/fired for being ugly which is why SK has such a high rate of plastic surgery.
There's a real play here. The jury is still out if it's "enough". You can't really "vote away" martial law in SK, in the same way you cannot legislate the President to be ethical in the US. Most of the real politics of capitalist societies don't happen in senate chambers, they happen in backrooms.
The US national stock pile is set to be depleted in 2025.
It's fucking crazy such a simple weapon hasn't been simplified in its supply chain demand for over 100 years. Antimony is literally used to harden the metal casings of the shells. That's fucking it. Seriously. That's fucking it. For 100 years the greatest most capitalisticalist empire on earth couldn't figure out how to more sustainably harden artillery shells without using a rare earth metal.