Let's make this easy. The term is "public service". To me, this means serving the good of the public for a limited length of time, AND then going back into the private sector where they came from. It also means they should receive a salary without ANY benefits excluding health insurance while they are in office only. Absolutely no pensions, no extended health care benefits after they leave office, no free rides on military jets for personal use. Then, if these congressional types cannot perform their duties according to the US Constitution then they receive no salary for that year (no budget/no salary)
Did I mention term limits?