No it doesn't, but that doesn't make CPI irrelevant either. All your example does is show that some statistics are sometimes not useful to some applications.
What you need to do is prove why CPI is not relevant to average Jetstar pilots. So far the only reasonable argument is that maybe you all send your kids to private schools that increase their fees well above CPI each year and therefore instead of 7%, education should be waited more like 20% or so. That might have the effect of moving it from 2.3% to 2.5%, but quite possibly still well below 3%.