>Any spending bills require require 66.7% yes votes in both houses of Congress

This is absolutely false and, in fact, has never been the case.

>a cloture vote. It can currently be rejected by a single _staffer_ of any Congressperson _via email_

This is absolutely false as well. You are confusing hold requests with cloture and are confusing the Senate with the House. Cloture is a formal roll call vote in the Senate; no "staffer" participates.