This may come as a shock but not everyone backs up to the cloud since Apple only gives 5 meg of free space and iPhones now come in 256 meg configuration.
Apple or for that matter no one can give what they don't have. I think that may be on purpose.
also ... IF the data is in the cloud the data is stored as encrypted data. Apple would have to deliver the unencrypted data or the keys so LEAs can retrieve the data. At least that’s how it used to work. Been out of that area for a while.