What - because you insist that he hire people to man the phones on Saturday evenings? It’s the weekend. They are probably off with their families.
As I stated, I know as fact and from a decade of experience that many offices have a skeleton crew of staff assistants and legislative correspondents available to answer phones and support the senator while the Senate is in session. They cannot rely exclusively on Cloakroom personnel.
I'm not here to quibble with you or be petty. Frankly, I don't know why you made any of this an issue. I merely expect my U.S. Senators’ offices to be accessible when the floor is considering a vote, whether late at night or the weekend.