Now, before I begin, forgive any misconceptions or mistakes as I watch little more than the big tournaments and the occasional pro game and have very little understanding of the politics of the IRB.
I can understand NZRU hesitance in supporting the current RWC sponsorship system if their current system causes them to lose that amount of money but boycotting the RWC seems very counter-intuitive. Any top teams that choose to opt-out of what now is the premier rugby tournament decreases its prestige and value to potential sponsors. Less money would go in and less money would come out. The RWC does great things for increasing exposure to the game - especially in minnow countries such as mine - and building a "rugby brand" that is appealing to potential sponsors at all levels of rugby. Any bar that I walk into these days in this particularly average Canadian town has a rugby game broadcasting on the wall with a few people watching intently and ten plebes asking 20 questions about the rules and the game. If broadcasters can tap into the potential viewership market in North America alone there would be more demand for Super Rugby, Magners, Heineken Cup, Currie Cup etc. etc. etc. thus increasing their value which would result in more money for the unions. I do believe this will happen as these sports are only getting more popular.
That being said, if the IRB still refuse to change their sponsorship policies, is there any fat cutting or test match scheduling that NZ and other top 10 RUs can do to save on that margin of profits. It feels off that there can't be a way to schedule more games and put to greater effect that rotation system for the national team that seems to have divided the kiwi supporters on TRF. If Canada can make it to the world cup on bake sales and unicorn wishes, there must be some way that NZ and the other top tier nations can make it work.
My apologies if this is rambling and all over the place but I'm just back from work, sick and probably should be napping.
At last a sensible post! Yes there is something that can be done.
The IRB should adopt a similar model to that which FIFA uses to run its World Cup. Non clashing sponsors should be allowed unrestricted relationships with their teams, clashing sponsors are negotiated by the actual sponsors themselves, the Unions, and the IRB act as mediators.
Also, during the six weeks of the RWC, it should be the only game in town, There should be no other professional domestic or cross border rugby competitions being played anywhere else in the world. This would require some "compression" of the remainder of the season, but the lads in the ITM Cup have shown the way. If they can play 10 rounds of round robin competition in 7 weeks with midweek games and four day turnarounds I see no reason why the big boys up north could not also do the same.
In the Northern Hemisphere,this could be achieved one of two ways;
The first, and easiest would be to play the pool stages of the Heineken Cup and the Amlin Challenge Cup as a mid-week competition. Six pool rounds = six weeks. The knock out stages revert to weekends.
The second is more complicated, but it would require six midweek rounds to be interspersed over the whole of the remaining season. Effectively there would be a midweek round and a four day turnaround for everyone, once per month
In the Southern Hemisphere, three things would have to happen;
Firstly, Super Rugby would be required to have short turnarounds as well, but they would have to be dispersed over the whole length of the competition due to travel distances. The schedule would need to be arranged so that each team plays their local derbies consecutively in pairs, and one of them would be midweek, e.g. Crusader play Blues in Auckland on a Saturday, and the Chiefs in Hamilton on a Wednesday, or Highlanders play Hurricanes in Dunedin on a Saturday, and the Crusaders in Christchurch on a Wednesday. This would account for three of the six weeks needed
Secondly, Super Rugby would have to start one week earlier. That accounts for four weeks.
Thirdly, the ITM Cup starts the weekend after the Super Rugby Final, and the Four Nations starts on the same weekend. That is two weeks earlier than normal, so there are the last two weeks making six weeks saved.