That example makes sense, but if you want to impose a rule you have to worry about the cases where it doesn't make sense. What about a plumbing business which dispatches jobs within a 5 mile radius. If the employee moves 2 hours away, suddenly the company has to pay 4 hours a day of commuting.

The net result of this could easily be workers being required to travel to and from a central location as a workaround, when they could have better outcomes travelling straight from home - hurting the people you are supposedly want to help.