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The United States Senate and House of Representatives provide an "Upper House" of 100 Senators and a "Lower House" of 435 Representatives.
The United Kingdom House Of Lords has 736 voting Lords and the House of Commons has 646 MP's.
There are also Northern Ireland , Scottish and Welsh Assemblies - although not an English one.
If we got rid of a lot of the lifelong "Jobs for the Boys" in Parliament and reduced the numbers to the same as the USA there would be significant savings.