I think it's a pretty reasonable assumption, even if the ordering is strictly personal (some people would take a job with better work-life balance instead of the better paying one, some would make a different choice, same thing with technology stacks etc.).

The second premise also seems to be true, though I would phrase it in a descriptive rather than prescriptive manners - the choices you make regarding job offers reveal your preferences ("the ordering of jobs").

Having no "job ordering" would result in people taking jobs based on a coin flip, wouldn't it?