If an officer does something that should require a court order and don't have one then they end up prosecuted in the same way a criminal would be. You put checks and balances in place to make sure that they are caught.
The problem is using "the enforcer," breaking in, and taking file cabinets is loud and obvious. Accessing your gmail account and dumping its entire history takes seconds and is entirely unnoticeable.
You can't compare physical and digital privacy, why are people still trying it?
If an officer does something that should require a court order and don't have one then they end up prosecuted in the same way a criminal would be. You put checks and balances in place to make sure that they are caught.