The senate doesn't actually need a supermajority to end a filibuster; they approve the rules that set how many votes are needed to break a filibuster with a simple majority.
Similarly they can replace the parliamentarian at will, as republicans have done in the past, but chose to keep a parliamentarian that prevented them from using budget reconciliation to fulfill their promises to the voters.
Louis DeJoy (born 1956 or 1957[citation needed]) is an American businessman serving as the 75th U.S. postmaster general. He was appointed in May 2020 by the Board of Governors of the United States Postal Service (USPS). Prior to the appointment, he was the founder and CEO of the logistics and freight company New Breed Logistics and was a major Republican Party donor and fundraiser for Donald Trump.[1] DeJoy is the first postmaster general since 1992 without any previous experience in the USPS and the first postmaster general in U.S. history to come directly from the board of a privately owned competitor to the public–private partnership of the USPS entity.[2] His companies still hold active service contracts with the USPS, generating controversy over conflict of interest.[3]