Gross income is about $120k a year while deployed. But that's working 6-7 days a week 8-12 hours per day and always on call. I'm in charge of ~100 people, responsible for millions of dollars of equipment, and have to deal with many significant decisions on a daily basis.
Then I see a budget line item for a contractor to be a field service representative for a single piece of equipment and there's $250k allocated for one year. Yeah that guy is not getting paid $250k, there's definitely some profit and overhead from his company, but I'm sure that person is making $100k+ for waaaay less work (albeit in a foreign country). So yeah, I might feel a bit underpaid compared to that. On the other hand, with the tax benefits and the fact that a significant chunk of that gross income are allowances that are completely untaxed, my effective income is probably closer to $140k.