I'm not disagreeing with you. I think "fix the police" is a more accurate slogan. But slogans are intended to prime someone about an idea (not to convey!) and generate emotion. But trying to read any slogan as a literal meaning is simply naive. Slogans have to be smaller than a tweet and look at what a clusterfuck conversations on twitter are. Hell, even here where we can type hundreds of words it is difficult to accurately convey complex ideas.

I said in another comment, communication has 3 components: what is said, what was meant, and what was heard. We have to recognize that these are 3 different things and frequently all 3 are different. Communication is extremely difficult. So try to say what you mean and try to hear what was meant. (obviously this is a saying and in of itself is limited and should be taken more as a baseline idea rather than a literal and absolute point to stand on)