Why are the the Good and Responsible Senators wasting their time in attending the WB Senate of miriam?

We all know that its just like a play wherein its supposed to be a genuine investigation but nothing will happen coz Miriam is for Gloria Arroyo and Philippines is now hopeless if Arroyo is still the President..How shameful that WBank submitted to the Ombudsman their investigation result and they will say that WB officers are liars..WB are right..