cyn·i·cal
/ˈsinək(ə)l/
1. believing that people are motivated by self-interest; distrustful of human sincerity or integrity.
"her cynical attitude"
2.concerned only with one's own interests and typically disregarding accepted or appropriate standards in order to achieve them.
"a cynical manipulation of public opinion"
The tone I imagine when I say something like “legislators only consider the desires of plutocrats” is like saying “plants survive by photosynthesis” or “the Efficient Markets hypothesis is only useful as an occasional approximation” or something - neutral observations of factual descriptions of how systems work.
“Cynical” implies a normative judgment, or some extended assumption as if my comment has anything to do with presumed self-interest or distrust of sincerity.
While I'm playing the reference material card:
Cynical
Antonyms of CYNICAL
positivist, cheerful, trusting, optimistic, positivistic, sentimental, impractical, undoubting, idealistic, naive, believing, hopeful, positive, trustful, rose-colored, romantic.
The worldview you describe isn't any of those.