Why Not Go For $100 Million?

In the story from the Tennessean linked below, we hear this:

Jean Barwick, executive director of the Williamson County Republican Party, held up a small manila envelope in her office that she said contained the drive and the letter. Scrawled in green lettering across one side are the words “For Rep Learders” (sic).

Barwick said she found the package Friday and called the state GOP office to see if they’d received a similar envelope. Barwick did not call the police until Wednesday, she said, because she didn’t think the extortion attempt seemed credible.

“A million dollars seemed kind of low,” Barwick said. “If you’re going to go for a million, why not go for $100 million.”

The GOP executive director thinks that Romney’s tax returns are so bad that he’d pay up to $100 million to keep them from being released?