Because he's batshit crazy.
The partnership came to a crashing end when Armey marched into FreedomWorks’s office Sept. 4 with his wife, Susan, executive assistant Jean Campbell and the unidentified man with the gun at his waist — who promptly escorted Kibbe and Brandon out of the building.
“This was two weeks after there had been a shooting at the Family Research Council,” said one junior staff member who spoke on the condition of anonymity because he was not authorized to talk to the media. “So when a man with a gun who didn’t identify himself to me or other people on staff, and a woman I’d never seen before said there was an announcement, my first gut was, ‘Is FreedomWorks in danger?’ It was bizarre.’ ”
[...]
Armey appeared out of touch and unsure of how FreedomWorks operated when he took over that Tuesday morning, according to interviews with more than a dozen employees on both sides who witnessed the takeover. Sitting in a glass-walled conference room visible to much of the staff, he placed three young female employees on administrative leave, then reversed himself when they burst into tears; his wife lamented aloud that maybe they had “jumped the gun.”
Dick Armey literally staged an armed coup, and it failed. After it failed, he was paid to leave so he would not have an opportunity to run the organization into the ground. And if he was using an armed guard to escort people out of their jobs, someone could have been killed.
Of course we use the term "crazy" relatively, because FreedomWorks is no slouch in that department. With that said, Dick Armey's attempted coup was obviously too much even for them.