|There is a problem with the usual definition and understanding of "happiness." It is conflated with "pleasure" which is a very different thing. Real happiness requires a degree of self-sufficiency, of independence, of productivity of some sort. It isn't available to someone that doesn't grow into a fair degree of their potential.|
Real happiness is fed, in part, by self-esteem: specifically, the sense that one is competent to deal with what reality presents us. Leaches don't acquire that sense. Any set of actions that require some degree of avoiding a clear understanding of reality or of one's motives or of one's identity, will also automatically diminish one's happiness, leaving instead some degree of anger/shame/fear/hurt/bitterness/etc.
Leaches can feel pleased that they are getting away with something-for-nothing schemes, but the pleased feelings are a bad choice since it involves choosing a path, a lifestyle, and some twisted thinking, all of which preclude what is required for the kind of personal development that produces self-esteem and real happiness.
But if the point of Dean's post is that we can build stupid systems that reward leaches who then reproduce in greater numbers than those who are productive... Well, that is all too true - but it won't make a sustainable utopia out of any system that ignores human nature's true needs, nor will it be conducive to generating real happiness for anyone.