I agree, I think he's talking about the roads and what not if you listen to it in context, but the rest of the speech IS about how you didn't build your business. That and the almost mocking tone he takes toward anyone who thinks they are successful because they're smarter and harder working than anyone else is what I think is more damning. Notice all of his examples of people/things that helped you succeed are from the government? He basically says, "You're not successful because you're smart (crowd applause!), you're not successful because you work really hard (crowd applause!), you're successful because the government made you that way. We gave you a teacher, a road, a bridge, the internet, it's the government that made your success, not your ideas or hard work."That's what people should really be infuriated about.