I don't think you know how "The Club" works. Reality is, they are thick as thieves when it comes to stuff like this. They will protect each other because they know that one day they too will need each others support.
You must NOT remember the House BANK SCANDAL or the House POST OFFIce SCANDAL!!! WE, the PEOPLE, got rid of those PERKS!!
Absolutely true. They are reluctant to expose others out of fear their own sins will be revealed in retaliation. There are lots of skeltons in those closets.