I interviewed for a job at Medline a few years ago. Went through the ringer with several face to face interviews, two days on the road "shadowing" with another rep, dinner with my potential boss, and eventually a flight to Chicago where I supposed to go through three more interviews and several tests. At no time in the process would they ever tell me what the base was or how that paid - no details at all except for telling me that if I was a good salesman, I'd make well over six figures my first year. One rep that I shadowed showed me his gross earning for the previous year and it was about $120K. What he never told me was his expenses. He was totally vague about all of that and kept telling me I had to be aggressive - it takes money to make money and all that.
When I got to Chicago, I finally pressed the first guy (some dickhead VP) about the compensation plan. I had been in sales for over 20 years and knew every trick in the book. I was civil, but firm and I wanted to show him that I can be "aggressive" when it came to making money.
End result was that I never got the other two interviews and I was sent back to the airport and I took the return flight home.
I saw all I needed to see and I guess they did to. I wanted no part of a sleazy pay plan and they wanted no part of anyone who could identify one.