[eesmith]

You are nowhere near the limit of housing possible in the UK, and are nowhere near the zero-sum point.

Your system is set up to encourage people in council housing to make enough money to be able to buy their home. With your zero-sum argument in mind, you must think this unethical as it takes council housing away from the council.

Your system does not appear to be set up with your ethics in mind, so I hope you can understand why it doesn't seem like something others should be bound by.