Even if you are right, that pill will never be swallowed the way you are delivering it.
I'd prefer to spend most of my time on actual work. I'm getting back into Clojure and rediscovering the joy of coding (which disappeared, with fleeting breaks in it, when I went to Google and had to answer to a middle manager, which just sucks all the life out of what we do). That said, if someone is willing to give me $40,000 to tell him what he's doing wrong, I'll do so.
(In person, I'm much less abrasive, though. If I actually respect someone, and I respect most people, I'm nice.)
Burned Bridges Consulting would work because it's structured to produce the only employment relationship in which telling the truth is possible: one where there is no possibility of continuance.
Imagine if a manager had tons of advice for programmers, ie; 'listen to what management says, build what we want not what you think we want, pay attention when we interrupt your coding!'
If you've already done the whole management thing also and it worked out well then good luck to you.
The only credibility that has any place in anything is the credibility that comes from making others' lives easier-- solving their problems, teaching them, building things they want.
I think I'm poisoned by corporate environments (a startup being the worst) where you have to yell at people for days to get the permissions necessary to do a few hours of real work. I fucking hate that shit. Eventually, people stop yelling at each other about work (because they forget how to work) and are just yelling about the yelling. That's what Corporate America really is: recursive wankery with almost no one really working.