I think a term limit in the Senate of two terms for everyone except Cabinet ministers. would clear out the timeservers

is it really controversial to argue that any party that wants to win lower house seats in a preferential, compulsory voting, single rep electorate system needs to be centrist?
if a party wants to exist only in the Senate it can appeal exclusively to 15% of the electorate but not in the lower house

rating survey 5 ABC Sydney breakfast rated a 7.9% share of audience but 9am-noon rated 4.3%.
I'm guessing this didn't help