Identity Crisis

There was a time when tradesmen, Like plumbers or mechanics, were all fulltime people. But nowadays a tradesman has to do multiple tasks, Mainly because their number is dwindling. When they are not available, Householders have to do the job themselves. It stands to reason. Similarly, occupations like thieving, robbery, villainy, etc., Used to be carried on on a fulltime-basis. You could tell such characters apart By their behavior, dress code and looks. Fagin, Phoolan Devi, and Veerappan are eloquent examples. Even a street dog could easily single them out And start barking loudly. But nowadays, in these postmodern times, Or Kali Yuga (if you like), Such marks of distinction seem to be lost. Obviously, such ‘trades’ nowadays have gone part-time. But the question is: Why so many part-time people (seeing that their number is ever increasing), And when, evidently, there is so much scope? Why don't people go fulltime? Could anyone explain why or why not?