This high granularity of employment sounds like a terrible inefficiency. There are jobs that need to be done, but can't be, because they don't justify a full-time or part-time employee. There are people that need to work, but can't because much of the work that needs to be done is in chunks too small to occupy their time.

Perhaps we need something like an exchange for labor, like a stock exchange meets a temp agency. We could then transition chronically unemployed but capable workers into these labor exchanges.