Assuming we are talking about leisure aviation, what on earth is wrong with getting your PPL and then packing it in? It doesn't matter. It doesn't make you a bad person. Its not a waste of money as long as you had FUN getting your PPL in the first place.
On the other hand I do think there are folk who don't think further than getting the licence and haven't any idea of what to do next. It analogous in a way to blokes who retire and then don't know what to do and hang around at home getting under their wives' feet, because they haven't thought further than retirement day. For those PPLs its a shame because if they had thought it through and saw the licence simply as one milestone on their journey, they'd have a great time.
I prescribe three-axis microlights to cure the ills listed by BroomstickPilot (oh, apart from No. 4)
