> People vote for a government that does something very tangible about all of those things
People don't do that.
Politics in US(and democracies in general) have what I call the cable tv bundling problem.
Imagine you have only two bundle packages with your most preferred channels split evenly across two packages along with some unwanted channels. Regardless of which package you choose, you'll miss out on some of your favorite channel and still subscribe to unwanted ones.
You may enjoy watching a channel occassionally at your neighbors who subscribed to the other package but when it is time for renewal, you personally pick the package that gives you maximum bang for your money & preferences.
People will vote mainly based on one or two issues they strongly feel about.