I recollect that TTEs used to work religiously, over 30 years ago (before Pay Commissions). They used to check even passengers, not just M/Es. May be the salary needed to be supported with hard work to collect commission from fines collected. But after 7 Pay Commissions, the salaries are so high that with just the salary, they can support 2-3 families without working. Forget coaches of running trains, TCs supposed to man stations are rarely seen these days.