This is déjà vu all over again...
The battle with The IRS won in 1992 (and the NCAA lost), was probably the biggest single factor contributing to the size of the purses today.
I Find it interesting, that the ESPN article doesn't even talk about the tax breaks that corporations who sponsor Tour events get. The charitable status the Tour has allows corporations to chalk that up as a charitable donation, as opposed to marketing.
It's sad about The CMN tourney having to have been stopped, but the truth is that today, every event needs a major sponsor to survive.
The TMN tournament expected a lot more help from corporations, but just didn't get it.
EDIT: As an aside, if you look closely at the numbers, if The Tour lost their charitable status, the money's that have gone to charity, would end up in Washington's coffers. Almost dollar for dollar.
In addition, you'd see fewer dollars going to both Washington and the players because corporations wouldn't find sponsoring an event so appealing.