the people working multiple jobs is due to how the jobs have gotten 'securitized' - people have become specialists in low skill jobs, leading to no growth at all.

A person who is a Uber driver and a dog sitter is unable to display much skill addition after years on these jobs.

i can only quote anecdotal data about the attitude to work among generations. On the other hand, because of the changing nature of the work, it is completely understandable.