Any congresscritter who votes to exempt themselves and their staffs is VIOLATING THE EQUAL PROTECTION CLAUSE.
To KNOWINGLY do it is TREASON!
Nope, the 14th Amendment's Section 1 is binding on the states, not the FedGov:
All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside. No State shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States; nor shall any State deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws.
To KNOWINGLY do it is TREASON!
Unless it is levying War against them [the several States], or in adhering to their Enemies, giving them Aid and Comfort it isn't treason. Period.