There nonprofit status should be revoked for many other reasons. It was only chartered in support of the Clinton library. Not, of course, all the government kickbacks and bribery, etc.
If they had evidence of this it would be a clear reason to investigate further. Regardless of how we feel about Killary, the foundation would be at risk and they would have reason to review the receipts and disbursements .....which might indeed show other damning evidence?
Never forget Al Capone: guilty of many crimes but it was the revenuers that ultimately put him away, 555.