Compare Amazon to something done by government like the highways. When I order something on Amazon it nearly always arrives exactly on time as expected. Highways are always in a state of disrepair and congestion, and get worse every day.
This is not an example of why Bezos wealth should be used to build highways. Every penny of his wealth was earned by offering services in a competitive market better than the alternatives. With government infrastructure there typically are no alternatives and so nobody cares or expects much.
Bezos is not an enemy of the little guy, he's someone who has made it so much cheaper to build a startup. Remeber the days when the first $200K of fundraising would go straight to Dell for a bunch of bare metal hardware? Contrast that to AWS. He's done the same in many areas of the economy.