I think people are being kind of simplistic when they think of 'ideas'. The telephone and internet had ideas behind them but were they really 'great ideas'? Not in the historical sense because they were a conglomerate of various ideas. This is in opposition to things like Fordism for example. Most people don't know this but the reason Ford became a staple of American culture was because the government gave Ford ridiculous tax breaks and leeway during the 1920s. How else would Ford have afforded to essentially create a completely new system of worker efficiency? As another example take telephony. The government has invested billions in the infrastructure that allows people to go on the internet and connect to the world. Mass warfare (a 'Great' idea of the 20th century) couldn't have been possible without the government investing heavily in the military complex ever since WWI. A typewriter is not a great idea. It wasn't even that good of an idea. It's a practical idea but a 'great' idea? Not really.