I've read somewhere about this laziness thing. I don't agree. Laziness is laziness. Inventions and progress stem from creativity and need of efficiency.
Greed opens the road for corruption, plagiarism and other unethical behaviors. In the context if your post, I see it as a human need for evolution, for striving for more (see Maslow's pyramid of needs).
As for selfishness, well it just comes down to compation, helping others and giving back. If I don't have anything to eat, I'm not going to do charity activities or I will starve. I don't consider that being selfish, but survival.
Building a community on creativity, need of evolution and giving back to those who help you, it is a great idea to strive for. This would be qualitative community. Not all are suited for this. I agree everyone deserves a second chance, but not a third, forth and so on. I've seen this a few times on Steemit. They were told to correct their mistakes to no avail. Spending resources for people that don't want to learn and grow is a waste.