It's pretty clear that Google does not scale linearly to the number of people. As a company gets very big, it hits strongly diminishing returns, both in its effectiveness and its internal alignment towards consistent, unified goals.

Organizations grow in power slowly enough that other organizations arise to compete with them. In the case of Google, this can be other companies and also governments.

An organization may be greater than human in some areas, but there is a limit to its ability to "explode."