Proportional representation and local-candidate systems, like
our FPTP system, are often set up in discussions to be opposing in
their competing faults and benefits. Most mixed systems
do not fully maximise the benefits and avoid the faults of the two
competing systems, although they may represent an improvement (New
Zealand, etc.). Here is an idea for a mixed system that I think
does a pretty good job of maximising the benefits, and it has lots
of adjustable components to fine-tune the system and balance
various stakeholders' interests:
RIDINGS
Keep the ridings as they are now so that all citizens are
represented by a local representative; this is important for
accountability of politicians and fairness to all citizens to be
equally represented (small differences in riding sizes aside). What
I would change about this part of the system is a move to a
majority alternative vote system [AV] for each riding. While this
is supposed to favour the large parties, I think it ends strategic
voting which hampers small-party candidates on the first count
(especially for third place parties such as the federal NDP). This
will then help secure more funding for those smaller parties (at
least federally under the new funding system, which is another
great measure to make sure no vote is wasted).
PROPORTIONALITY
I assume that history shows that voters tend to favour larger
parties on the second ballot, although I wouldn't have thought so.
In order to balance this out, and to make the system proportional,
have a certain amount of additional seats available, 10-15% of the
total, that will be awarded to parties, not on a proportional
basis, but to shore up the parties with less than their
proportional share of the vote. This tends to favour the smaller,
national parties who get vote share but not ridings. These members
would have to come from the defeated candidates (and perhaps
runners-up in nomination battles for elected candidates) so that
parties do not get to arbitrarily make lists, and to avoid really
complex ballots. These members would not directly represent that
riding, since they lost to an opponent elected to represent the
riding, but these members could informally be regional
representatives for their party in those regions where their
parties' riding representation is weak. This helps to balance out
regionalism (particularly a factor at the federal level, but an
urban/rural split is common in provinces). In order to keep a
functional and stable governing party, these candidates could be
unable to vote on money bills, since these additional smaller party
candidates could force more minorities. This will allow the
government to maintain power, but non-money bills will have more
diverse opposition to check the power of the government. This is a
negotiable point; the exact voting rules of the proportional
candidates can be adjusted to make the system the most
functional.
EXAMPLE
If this was applied to the recent federal election, the NDP would
have been given about 21 additional seats and the Green party 10
(assuming 4% is above the threshold we decide on, and based on 10%
additional seats, or 31 additional seats from 308 ridings). This
would make the representation more proportional, with the Liberals,
Conservatives and Bloc not getting any since they got more than
their proportional share of ridings.
CONCLUSION
I think this gleans the advantages while missing the pitfalls, and
it has some variables to fine-tune to make sure the result is
functional, such as the minimum threshold a party must reach to get
proportional seats, the rules for removing candidates in additional
AV counts, the percentage of seats added for proportional
representation, etc. It does not make the assembly perfectly
proportional, but it makes it quite proportional, while maintaining
accountability and stability, causing little change to the voting
system (just ranking candidates), improving the significance of
every ballot, countering regionalism, making every local
representative supported by a majority of their riding, and opening
up the assembly to more minority voices without giving them a
disproportionate voice by holding the balance of power. Please
consider this system- I don't know if it has ever been tried, but
all its components have, and it is easily implemented and
adjusted.