Franking
franking .
franking priviledge
Franking Privilege
it is important because they can carry out their duties without having to worry about being arrested.
Franking is the right of Senators and Representatives to send job-related mail without paying postage.
Members of the United States Congress get Franking Privileges, sending job related mail without having to pay postage, high salaries ($174,000 per year). They also get free office space, parking, and trips to their home state. They have low-cost life insurance and use of gyms, special restaurants, and a medical clinic.
Without congressional approval
The president could send troops overseas without a congressional declaration of war.
Without congressional approval
A pigeonhole
"Franking" refers to the ability to send mail cost free without paying postage. In the US, members of Congress all enjoy a 'franking privilege" and mail sent from them using this privilege has their signature (or a facsimile of it) in the area where the stamp would normally be affixed. It was instituted in the early days of the US to allow members of Congress to communicate freely with their constituents back home without having to go to the personal expense of paying postage for the letters.
Without the alternatives we cannot answer