I think some of the detail is yet to be released so I guess we all need to review the impact on our individual circumstances at that time.
On another note,what I think the gov is saying here is not that sahm's shouldn't use childcare, not that people working 12 hours a week need to work 15, not that kids should miss out on education/social interaction. All they are saying is that if you don't meet the eligibility for a rebate, you are the one who will pay for the service being provided.
Seems like people value the time their child is in childcare and the benefits it brings, you might just have to pay what it's worth to continue rather than a taxpayer footing the bill. The money saved sounds like it will still go to childcare subsidy overall, but just targeted to working parents maybe? All the stories we hear of people working full time for little to no financial gain might be reduced if the subsidies are directed in a better way than they are currently. Who knows if that is what this 2015 budget will achieve though. We'll have to wait and see.