The guy had two priorities in business: pure, efficient design, and giving people transparent tools to help them achieve their goals. His "control freak" aspect, as you describe it, was a manifestation of his utter frustration with people who couldn't see the simple way of doing things, elegantly. His disdain for government was tangentially related to that as he couldn't stand the inefficiency present at any given level of the state, and it came to the foreground when he had to deal with anything bureaucratic. Say perhaps, dealing with a city "planning" commission (who were quite obviously present to simply add bureaucracy and try to get boodle) to build a new campus, or having to get plates for a car he was paying for.
Its a much farther stretch to say he bought a new car every 6 months simply to "have control" over the registration scheme, than it is to say he did it because he found the loophole, hated government, and decided to poke it in the eye. If your theory was correct and he was applying his "control freak" side to the equation, he would have had more than a 5 digit lobbying budget across all levels of government.