I'll take the bait. Government is far more efficient at providing military, police, fire, ambulance, postal delivery.
Military,
I'll give you that one, simply because there's so many factors, angles, priorities etc that it could be debated for infinity and still no concensus.
Police,
Why do we hire private investigators when the police cannot help due to their hands being tied through protocol?
What about private security?
Debatable as well, but not because of the government run system, but the policemen who took the job for no reason beyond wanting to help people.
Fire,
I believe a private fire dept would be very competitive for equal or lower budget.
Ambulance,
Many communities have been forced to go to privately owned ambulance services decades ago.
Postal service,
Several for profit parcel companies have thrived because the USPS is such an inefficient abortion of a system.
I stand by my generalization that anything the government can do, the private sector can do much more efficiently.