From the Washington Examiner:

“The real issue is, how do you raise the bar a little bit above what is now required by law and set out principles that will encourage voluntary action?” asked Duke University Professor Joel L. Fleishman, author and expert on foundations. “By agreeing to these principles, not just foundations but all nonprofits will benefit, as will their donors and volunteers,” he said.

It's usually pressure from outside -- some bad press, a congressional hearing, a grantee uprising -- that gets foundations to act. I wish the best of success to those trying to get foundations and nonprofits to voluntarily adopt a set of best practices. I won't be holding my breath.