About giving to the police
I think it's important to know and note that not all police officers operate the same. If I were to entertain the idea of having a police officer as my "friend" and protector of my interests, I would choose one that will help me, and allow me to show my gratitude afterwards.
But when it comes to all of those officers expecting to routinely get money when they haven't lifted a finger to help me with a problem? Those types I would avoid. They may be great guys, and helped tons of guys. But I'd much rather be friends with a officer who is not looking for a handout almost every time he sees me.
Those guys may not be helping you because they like you, they may be helping you to protect their investment in you. In other words, they are looking out for themselves. If you stop giving, they might stop liking you. Thats not a good thing. The association I'm talking about, you arent constantly giving him your money, so there is no routine. No reason for him to turn on you.