Originally Posted by
benzemalyonnais
. . . no one would ever take a job where they are forced to fly for 15 hours in Y on a regular basis.
This is not true at all. There are many employees in many industries who fly only Y, and are happy to do it.
I am not saying that I would be one of them; perhaps I am too coddled. I am sympathetic to the OP's point -- if it were your own money, or you were the owner of the company, could you justify it?
Sometimes you could. And it is not just about being productive the day after the flight. If one is a highly paid professional, then one's comfort is of value; anyone who flies internationally for a couple of days is probably doing something of high value to the company, so a few thousand extra dollars might be small relative to the value of the work being done.