It could be worse.  From the UK, I am not familiar with the finer details of the Australian voting system, but at least we don't have to decide who to give the keys  to the kingdom to for the next fixed term of four or five years, as in presidential systems.  I distrust all presidents - too much all or nothing power in the hands of one person. A prime minister is accountable to a parliament, and can be removed by parliament if he/she oversteps the line.  That very fact is usually enough to stop prime ministers from getting too many delusions of grandeur (i.e. acting like a president):

www.community.ebay.com/soapbox/political-discussion-please/22359586#M297753