Seems that the latest to bung up their charges are the Civil Aviation Authorities (CAA) here in God's own.
Stunningly one of the charges if quite new - $313 to file a medical certificate. Note that said certificate is prepared and printed by a doctor, who charges less than the CAA ($250 typically) and actually has to do some work, not just push some paper across his/her desk.
The Recreational Aircraft Association of NZ can do the whole thing for $70pa and the Sport Aviation Corp Ltd for $60pa all following the CAA's own rules. What other justification can there be for a charge of $313 except gross inefficiency at the department?