It is political - there are a variety of people who are against modern Australia’s British colonial roots, ranging the gamut from those who want all European influence gone and the remaining people to revert back to a romanticised view of the Stone Age to those who (more realistically) want more Indigenous influence upon our current system. Somewhere along that line is where the writers of this would fall, the ‘colony’ they want to fall would either refers to all European practises and institutions or some more abstract view of European influence over our society.