Sorry dudes, but it's true. I know a couple of guys who are flex instructors who live in MEM who made > 400k last year. They do a ton of extra sim support, all at 150% draft and sometimes at 200%. Sometimes these guys do 2 or even 3 sim sessions per day, mostly at the 150% rate.
Both of the guys I know instruct in the 727, but are passover paid for widebody capt.
They work on avg 26-28 days per month. But remember, they live in MEM, so they are home pretty much every day, other than offsite training. And being that they are instructors, they only fly the 1 trip (usually an out-and-back) per month.