I'm not sure what to make of this bill. It's 'out there'; the idea of 'twinning' Senate seats in this fashion is, as far as I know unique to the western world. It doesn't appear to be have been raised publically and there have been no calls for a system like this to be implimented.
What we would essentially have as a bloc, a constituency, a grouping whatever you want to name it of regions who decided to 'share' Senators. Two regions could elect say 2 Senators (probably under STV) However this is done in an arbitary fashion by agreement between regions. It dilutes the power of each individual region (by agreement) and would do nothing to address the disproportionality when it comes to representation based on population in regional seats.
Hopefully Senators will recall that I proposed a system where each region elected a number of Senators in proportion to their population. There was concern that elected a small number of Senators (2 or 3) at the one time under STV was not viable. Personally I would contend that it
is viable (given its application to Scottish local elections with success) and I am interested to see that it's being floated here.
So I take it electing small numbers of Senators using STV is fine
If so then part of the opposition to my plan based on that contention has dissapated and I am free to introduce it before the current Senate
It is a system which is fair to the principles of representation based on regions, based on population and based on proportionality.