Robert Heinlein had a novel, I forget which, where the legislature was bicameral, but in a different way than the current American one. In his legislature, the

Robert Heinlein had a novel, I forget which, where the legislature was bicameral, but in a different way than the current American one. In his legislature, the first house was responsible for passing legislation (but required a supermajority to do so, IIRC). The second house was responsible for repealing legislation, needing only a simple majority.