Congressional representatives have a service of 2 years. This is not onerous. They can come from all walks of life but should probably go back to private life after their term unless they have provided such exemplary service they deserve a second term. However, I feel they should be term limited. If they wish to continue to serve the public, they can run for the Senate or run for office in their state/locality.

Senators have a service of 6 years which is a bit longer but then, their function is more professional... like they have to hold hearings, investigations and approve for executive level agency leadership and judges. They do need more seasoning, education and a higher public service commitment. They should have a clear understanding of the Constitution and high ethical standard for themselves and others. I don't think they should serve for more than one term, 2 terms tops.