If you seriously think fast food is a government agenda you have too much time on your hands.
Well....
Except for the fact that the govt allows pink slime and other processed, false food to be sold as nutrition.
Except for the fact that many mcd workers are also on govt benefits, which is corporate welfare at some level.
Cheap calories and entertainment keeps the masses under control - lazy and distracted - that's the larger issue.
Look up "bread and circuses" during the decline of Rome.