Well a person does not have a right to attend a Public or private school. Therefore nuts to their opinion on uniforms.
You can opt out for alternative education then.
In Australia, education is mandatory (and I'm not sure how many people are getting homeschooled here, but I imagine the numbers are extremely low), and I believe there are significant legal implications for those who attempt to skip by it.
Considering each kid is paying an average of $400 a term in Primary School and $1200 a term in High School, it's not hard to see why the Government would want every kid to go to school. Imagine all that juicy tax.