"Dropbox or on-premises, wherever your data is, the government can spy on it, so why bother?"Actually on-premises is slightly better: At least you will KNOW that you are being spied on.
- Public cloud: Police ask your cloud provider for the data, and you don't hear about it.
- On premises: Police ask YOU for the data.
Data requests are most often accompanied with a gag order:
"Give us this user's data, but don't tell anyone we asked for it."
An example of this got detailed in The Guardian last week: Google, after sending some of its customers' data to the FBI, waited 3 years before telling anybody.
This is one more reason to prefer on-premises to public cloud.