A given company shouldn't pay you less for working from home unless it actually reduces your usefulness to them, in which case they're perfectly entitled to propose a cut and hope that doesn't demotivate you too much. If that means two more free hours a day, a better lifestyle and/or lower costs of living then you're still quite possibly better off worth negotiating that pay cut.

Realistically, for most people absolute freedom to work where they want probably means leaving their existing job and having much more restricted choice of jobs or companies looking to contract out, which unless you're presently underpaid will probably to lead to lower offers .