Spiraling about my IDR plan.

I have an insane amount of grad school debt and have had zero gainful employment in my field since I graduated in 2017. I’ve been on IDR since then because my income has barely been enough to live on. I’m currently enrolled in an IDR plan. Can they just decide to end that tomorrow? If IDR goes away I genuinely feel like my life will be over.

How much can the government garnish your paycheck? 20%? 50%? At a certain point does it not make more sense just to stop working so there’s nothing to garnish? As I said, spiraling.