That's mostly the work that you want to do. The work you must do when being forced by economic factors, especially the extra job one might take in order to make ends meet, gives a sense of dread to a person's life. We can talk about a sense of purpose when people are more-or-less financially stable (at least nothing threatening their first level in Maslow's pyramid) and they get to pick whatever they get to work on. But when you're one step away from homelessness, the sense of purpose and the value derived from that takes the backseat.