I'm unaware of any Google product with any kind of per-user "admin" UI that only employees can access.
That kind of thing isn't good for security - an evil employee could use it for bad things.
Instead, all accounts get the same permissions, except disabled accounts (and in some cases blacklists for certain features, but these are avoided because maintainance of the list is a burden).
The permission can be marked on the account using the account management tool. The product would simply read the flag on the account, so the product would not have its own administration tool.
There is no technical reason why I should lose access to my documents if I happen to have abused some other Google service. There is just lack of will on Google's part.
That kind of thing isn't good for security - an evil employee could use it for bad things.
Instead, all accounts get the same permissions, except disabled accounts (and in some cases blacklists for certain features, but these are avoided because maintainance of the list is a burden).