I'm actually not remotely bothered about "dead rubber" ODI games because, a bit like Cribb, I don't actually consider the result of a bilateral ODI series very important, really. It's never meant much to me. All ODIs, to me, are preparation for World Cups, and the only ODIs where I'm actually especially concerned with the results are World Cup games.
Because you dont find dead rubbers boring thats it?
Simply put Australian cricket cannot suffer many more summers like it did this year. Cricket is the national sport, and one of the 3 main sports (other 2 being Aussie Rules and Rugby League) by de facto. We're not India. Cricket is where it is because its played throughout the whole country and has an international aspect to it. But that doesn't mean its place is guaranteed forever.
People aren't terribly worried about this years terrible ratings/crowd attendance because the upcoming Ashes tour. There will be over 80,000, and if the series is half decent, 90,000 for boxing day. Same with the Twenty20 and good crowds for the ODI's largely due to tickets sales starting in July.
But if England perform like they did last tour, besides the last two matches of the tri-angular series where Collingwood and Flintoff fired up, they were no different to Pakistan or West Indies this year. Difference was that Australia wanted revenge for 2005 and people viewed this as the last hurrah of one of the best test sides ever. If Australia win 5-0 next season then not even the legacy of the Ashes will guard against a backlash. While most believe this current team is good, no one believes it is great like the 2006/07 team.
Also, if you look at Australian cricket we love to have trophies and titles for tournaments against other countries. Of course the Ashes isn't technically a trophy it is an important symbol. Besides the Ashes theres the Frank Worrell Trophy, Border-Gavaskar trophy, Trans-Tasman Trophy, Warne-Muralidaran Trophy, Chappell-Hadlee Trophy, the defunct triangular World Series Cup etc. We want meaning, even if its a cheap trophy whacked together like the Frank Worrell trophy.
At the moment theres probably more interest in the ODI series in NZ right now than there was for the Pakistan and W.I. series because it looks competitive.
Of course there is cultural attitudes too. Australians would not just accept the oligarchies that exist in European football. I dont need to look at the tables to know that Man Utd and Chelsea are at the top of the EPL, Real Madrid or Barcelona in the La Liga, Inter or A.C. Milan in the Serie A or Bayern Munich in the Bundesliga or the farce that is Scottish football - two teams competing to see who can beat the minnows better.
Australia has a very competitive and volatile sporting market. Look at the explosion of basketball in the late 80's, early 90's and its spectacular decline. For example rugby is suffering at the moment for many reasons. One of those is the increase of interest of soccer. For years rugby fans taunted Aussie Rules and League fans that it was an international sport and they weren't. Bit hard to do that to football.
Australians find lop sided, unequal contests an anathema and will simply switch off.