Have you read some of the early writings of Bill Gates? It can be difficult to reconcile that with some of the things he did with his company. Maybe Google's main strategy today is to make the Internet better and maybe today providing less value to the customers goes against their goals, but I suspect they're going to exist for a long time. What would make them more money in 15 years when they've killed off every competitor in the space (they may not do this, but they could. They have the resources)?

You have very high expectations of people you don't know, and who wont remain in their current positions forever.