Don't forget on top of desk rental, are handling agent/staff costs and often either Common Use, (CUTE) or other system charges and maintenance... It all adds up to a big number quite quickly.
The desk rental is usually only a very small portion per pax of the overall costs related to the check in service. MOL is right to have a crack at these.... and he will make some progress.
How long I wonder before ATC is the next focus of LCC cost scrutiny, beyond a few ELFAA words..
Even Willie Walsh was having a pop at these while he was still at EI.
FF