Actually however it is worded it is a con. Under uk tax law if you work via an agency to a single company, as you would have to as a pilot, you are by definition an employee of that agent. I stress that this is for tax purposes only. The agent doesn’t have to give you annual leave, sick leave or any other employee benefits. I am surprised that the IRS haven’t jumped on this one yet. When they do rest assured there will be a serious mess on the fan.