Everyone is self serving to a degree. And if you're a professional "decision maker", you will get detached from the emotional side from it. Just like a surgeon better be detached from treating the slab of meat on his table. You don't want emotions, you want professionalism in some jobs.
It's really hard for me to understand people's constant paranoia about politicians honesty. I don't give a shit if they're honest or not. I want something, they promise to do something, if they don't do it, I won't support them next time around. It's not that frickin' hard. Of course, I'm talking about a population that voted Trump into office. It's so easy to blame politicians lying when the harsher truth is that most Americans are just too.. um, one-dimensional and/or lost in their ideological trench wars to see the big picture. This whole gun debate is a perfect example for that.