I won't totally bash Mad Max, he occasionally gets a good idea, like a return to proper manual gearboxes with clutches (sorry, I hate flappy paddle gearboxes).
Probably a good play to highlight the eco side of things to, good
PR for the auto industry means more money to play in F1. Why he wants to go AWD, I can't really imagine.
The FIA has always been looking for ways to cut performance in F1, as its an ongoing battle where the FIA takes steps to slow the cars down, and the engineers quickly overcome those hinderances. Without that, F1 machines would be so fast they couldn't safely exist on a racetrack.
Equally, the FIA tries to reduce costs (not always successfully), because otherwise the manufacturers keep trying to outspend each other until F1 isn't viable, and then they leave...
Mosley believes that by extending the life of the engine, it will save the teams money, but the cost of building the engines is probably going to be a lot less than designing race engines that will last 5 races.