In the US, natural burn programs for fuel load reduction are promoted by the environmentalists, and opposed by corporate interests and owners of scenic estates. The extreme environmentalists would have been burning the canyons and landscapes of SoCal on a schedule, to imitate the natural fire regime - but the kinds of people who own fancy houses in the woods wouldn't have it.
There was an interview on the radio this morning with a guy who was fighting a fire near his brother's house, and had saved it. His own house was nearby, but it was pretty safe - because he had cleared the brush on his property. There is nothing stopping some Californians, at least, from clearing the brush and fuel load from their own yards and neighborhoods. They just don't do it.