Then isn't it a proof that the economic theory doesn't work in practice? We're talking two economy seats paying the price to charter the whole jet: https://www.privatefly.com/us/private-jets/large-airliner-hi...
The actual block hour cost for a 737-800 is a third that rate. eg. $3500/Hr.
For a small group, something like a CJ3 is more typical.
https://www.privatefly.com/us/private-jets/small-jet-hire/Ce...
$2676/Hr on PrivateFly
Here is the block hour cost for a variety of small airliners.
http://www.planestats.com/bhsn_2017mar
737-800 is $3500/Hr depending on the operator. $6785 per economy seat for a 2 Hour flight is outrageous.