This is my sense as well. Growing up in a restaurant, I could see the cash being counted each evening. You scrub the toilets, make smalltalk, get orders, cook the food, serve it, clean the tables. At the end of the evening you have more cash in the till than at the start. Results are very obvious.
Most people who get a desk job will not see this, in fact they will barely ever meet an end consumer (person who eventually pays VAT for example), and the money will have passed through a huge number of hands before getting into their account each month. Doing a slightly better or worse job makes no difference.
