I don't think that people are too different between all the various states in Australia...and I think that this applies in the USA as well.
I don't understand why Queenslanders cannot buy alcohol in a supermarket ... or why Victorians can buy certain drugs in theirs ... is driving at 110 only the best speed in certain states..and in others it is set at 100?.....there is really very little difference between us...it IS just one country...why can't we just have one set of National laws for all basic things in our life?...why make everything this complicated?