Lightbulb chronicle 19-001

Fact 1: Guam senators's annual salary: $55K each

Fact 2: CNMI legislators's salary: $32K each

Fact 3: The Guam Legislature is unicameral; the CNMI Legislature is bicameral (to pass any bill, you need to go through two different bodies)

QUESTION: Why do Guam senators make nearly two times more money to do half the job of a CNMI legislator?