So why would a company want total control on its ecosystem ? Because government don't want social unrest. So if you can ensure your platform is free of "terrorist", then you can discuss with government better. For example, if you're secure, you can position yourself as a reliable player on banking, e-health, etc. That is, you gain a very strong position to shape society in ways you're interested in. Don't forget that big companies have the power to do that and that those who command them are not required to be benevolent. They are private companies so there's no oversight on which interest they serve first.
It's not all doom and gloom though . As computer gets into our lives, more and more government and parliaments will become aware of the issue and there will be a place to fight for our rights. It's already the case.
The only thing that matter is : a computer is a general purpose machine and must stay a "general purpose" machine.
