We do better when we have a strong opposition party, so I hope the Conservatives pull their thumb out at some point, but they do need a spell in the wilderness before they're given back the keys to power.  The problem with lowering taxes is nobody wants to also have their services cut.  We need infrastructure improvements (and the Liberals could do some thumb pulling on this as well - get on with it, people!) and the improvements have to be paid for. 
What we really need is a royal commission on taxation.  The last one was done in the 60s when there was one major income earner per household who worked until 65, then died within 5 years, so income taxes made sense.  Now we have gig employment for the young, and 30 year retirements for the over 60s.  The young can't support that many retirees with income taxes.