This is correct but it’s more than that: it’s beyond any reasonable dispute. Anyone with a job description that requires them to be responsive to on-demand need

This is correct but it’s more than that: it’s beyond any reasonable dispute. Anyone with a job description that requires them to be responsive to on-demand needs “on the job” will recognize it. I wasn’t scheduled for on-call at my last job, likely because I was already working 80+ hour weeks for months on end, but if anyone suggested it I would have had a very abrupt and serious conversation about comp adjustment.