Bartending jobs increase because Americans are becoming like the people in the old USSR...They get drunk to forget how bad things are......
See # 7; in my area, people with families and mortgages dropped out of the bar scene years ago (and the town had a big bar culture in the past). Nowadays the customers are younger people with neither of those, with no intention of ever having either of them; bars give them something to do while others are working second jobs to keep their homes or tending to their children.