It has also been claimed, however, that the Catholic–Protestant divide is intermingled with class issues. Republicanism in Australia has traditionally been supported most strongly by members of the urban working class with Irish Catholic backgrounds, whereas monarchism is a core value associated with urban and rural inhabitants of British Protestant heritage and the middle class, to the extent that there were calls in 1999 for 300,000 exceptionally enfranchised British subjects who were not Australian citizens to be barred from voting on the grounds that they would vote as a loyalist bloc in a tight referendum.