Not sure if I am on board with that. Compulsory voting guarantees that every last moron must vote.
More of a compulsory registration.
COMPULSORY VOTING
Australia is one of a few countries that have made voting compulsory, so voter turnout is always high regardless of the level of interest in a campaign. The 91% of eligible voters who cast ballots at the last election in 2016 was the lowest turnout rate since failing to vote became illegal in 1924. Turnout at the previous election in 2013 was 93.2%. Failure to vote without an acceptable excuse attracts a 20 Australian dollar ($14) fine.