I think the standard or minimum wage should be determined by the type of care and training undertaken prior. For example, if the carer was someone who had a degree in early childhood education, and wrote programs, had some child psychology training, discipline methods training etc, then the wage should be akin to a teacher at the same level. For example the director of a childcare that runs kindy programs etc probably has a master of education should be paid the same as a teacher with a director position and masters - in Victoria I believe that is $85,000 - 95,000 pa. Classroom teachers (with a degree get somewhere between $60,000 - $85,000).
To run a family day care, and correct me if I'm wrong, you require a certificate lll or lV in childcare an insurance? My thoughts are this should be equivalent to around $45,000-$55,000 salary (I.e. paid leave, 37.5 hour a week) - so that figures at about $23 - $27 an hour. Probably it differs everywhere but I thought a FDC could have max 7 children, including their own, but only max 4 under school age - at $6 an hour that is $24 school hours and $42 after school hours.