Maslow is known for the whole self-actualisation thing, the top of the hierarchy of needs, I'd say in part because managerial text books and marketing men seized upon those ideas.
However, he was supposed to have substituted self-transcendence in actualisation's place, this is a stage at which people are characterised by generosity and giving, in fact, giving without counting the cost. This is not necessarily something to do with wealth, it could be being a listening ear to someone who needs it and non-monetary/immaterial.
So what is the top of the hierarchy of needs? Which sounds the better pinnacle?