I was thinking through an idea a long time ago about using blockchain technology to allow citizens to vote on policies that affect them so they wouldn't have to rely on politicians... but I think this is the reason why it wouldn't work - how could I vote if my city budget should be spent on building a new intersection when I don't know anything about road construction, city budgets, tenders, trustworthy contractors, traffic flow, etc etc etc. Obviously things get way more complex when talking about state or federal policy.
I think ultimately we have to find experts and institutions that we can trust because I can barely keep on top of the things people trust me for, let alone all the areas I don't know.