Let us not forget that thousands of MENIAL workers - and I count myself among them, fwiw - worked constantly through a two-year pandemic to little or no thanks, be that verbal or remunerative. Jack, of course, did not.
Similarly, he strikes me as someone who would be unthinkingly rude and entitled around waitstaff, which is a red flag the size of which you'd only see off a Chinese aircraft-carrier. And if subsequently called out on it, would then suddenly remember to blame her 'anxiety' or 'ADHD' for her astounding rudeness.