In many countries it is illegal to work for free - companies have to pay you minimum wage regardless if you agree to not be paid. In a way this open source model provides a loophole through which companies can exploit developers or it puts developers who would love to contribute to open source into disadvantage. I think we need changes in law to ensure even if people want their work to be used for free to be reimbursed. This way if you want to work on open source you won't have to worry how you are going to pay your bills. I need to think how to argue this better and make politicians aware of this issue. Take a look how big corporations were able to amass such wealth - they don't pay taxes like small businesses do and they don't pay salaries for R&D as much as they should, because there is always that open source project to appropriate, so why pay?