In my area for smaller companies it's a matter of culture really. My sister is currently fighting to be able to do just that. Her supervisor has this need to keep tabs on people - this is an attitude I've seen in many other places.

Hell, there are proverbs predating any notion of a modern workplace that suggest you should do so as a business owner.

I on the other hand am employed as a contractor for a large company which noticed the profitability in having people working remotely - at least the contractors. I guess it boils down to the size of risks a business can afford.