Too broad of a restriction. It should depend on the mission of the trip. I work for a burger joint. We use a private jet if we need to visit lots of restaurants across multiple states in a single day (it really is NOT luxurious). If we have 8-10 travelers and it saves us 10 commercial flights and 10 hotel rooms for multiple days and it gets us back in the office sooner, then it is a bargain. A representative may also be traveling in a group, with a dynamic schedule and multiple stops. This should not be a class warfare issue. It should be about dollars, cents, and effectiveness.