Linking to the new (to me) ACSL on this licensing discussion because I think it is an excellent summary of the debate about different open source licenses which people can catch up on in just a few minutes.
The Anti-Capitalist Software License (ACSL) can be adapted of course, but as it stands does not require disclosure of derived code, but limits use to individuals and organisations which do not exploit labour, but are either non profit / educational, or employee owned.