So, I'm thinking of doing a unit in a class I'm teaching on issues in economics and ethics. Any suggestions for readings that students might like?

Right now I'm looking at Sandel's What Money Can't Buy, some work by Debra Satz, Liz Anderson. I'm open to pretty much anything though.

Any good selections from Aristotle? Great defenses of the market from a philosophical perspective? Definitive critique of utilitarianism that students could understand? Popular examples of economic thinking that could be useful for good discussion (e.g. Freakanomics)? Papal encyclicals? Pieces of Marx that can be read and discussed without spending too much time on them?

So, pretty much anything would be useful to me at this point. From chapters, to articles, to popular books.