According to Wikipedia, Oklahoma City has a population of about 540,000. So, roughly speaking, 8 percent of the citizens of Oklahoma City just stuck the other 92 percent with a tax increase. That’s hardly a case of majority rule.
Well, around 25 percent of the citizens of Oklahoma City are under 18 and can’t actually vote, so there’s no point in blaming them.
On the other hand, the law specifies that ballots are counted only for voters who actually cast them, so if there’s some Nixonian silent majority out there presumably keeping its mouth shut, you’ve got to wonder why they don’t bother showing up at the polls, the only place their opinions actually matter. (About 30 percent of registered voters in the city turned out on the 4th, which is about twice the average for a city election.)