Can't speak for everyone but my worry for productivity while on the edge of burnout had nothing to do with sacrificing myself for the company. I was worried for my job, that's it. That falling below some unreasonable threshold of work done would get me fired, while realizing I can't keep up with the amount and speed of required work.
Fortunately it was mostly in my head and passive aggressive worked very well in reducing expectations. To a point where I became stressed that I was asked too little. Literally "they" forgot about me for a while. So while enjoying a paycheck for nothing, I realized that cannot last so sadly I became more involved, which lead to more work. At least for the time being I seem to have mastered the screws to throttle productivity and become a classic "do the minimum" loser from the Gervais hierarchy. (Which if you familiar with the concept just means long term sustainable amount and nothing more, nothing less).
Fortunately it was mostly in my head and passive aggressive worked very well in reducing expectations. To a point where I became stressed that I was asked too little. Literally "they" forgot about me for a while. So while enjoying a paycheck for nothing, I realized that cannot last so sadly I became more involved, which lead to more work. At least for the time being I seem to have mastered the screws to throttle productivity and become a classic "do the minimum" loser from the Gervais hierarchy. (Which if you familiar with the concept just means long term sustainable amount and nothing more, nothing less).