I totally agree but the people I'm talking about are not the kind of people that will return the favor, they're just slackers who are looking to do the least am

I totally agree but the people I'm talking about are not the kind of people that will return the favor, they're just slackers who are looking to do the least amount of work possible and offloading it onto you is just one of many tricks in their toolkit of avoiding doing actual work. People that will return the favor do exist but the amount of coworkers that will do something for me is vastly out-weighed by the aforementioned slackers. And the same thing about going out of your way to help out end users, it just ends up being expected of you and if the next time you say no they might raise a stink and get you into trouble, either for not following process the first time, or for causing a bad and inconsistent user experience by NOT helping them the second time. It's easier to just do what's expected of you and nothing more, nothing less.