Nobody in a position to make the decision gains anything from lowering your salary. Reducing your pay doesn't solve a problem they have, but explaining how you

Nobody in a position to make the decision gains anything from lowering your salary. Reducing your pay doesn't solve a problem they have, but explaining how you don't work 10 hours a day like the employees of $BADMANAGER creates a problem they don't have. Letting your devs goof off/work on the side while keeping the seat warm is easier for everyone.