Ask HN: Why are there no tech startups in Australia?

I grew up in Aus - then went to the US for college and haven't really been back since (5ish years) until now - for a short holiday. I've been trying to sniff out a startup scene in Sydney and Melbourne and cannot find one. In fact there's a general dearth of creative ambition: why would you want to do anything other than be a Doctor, Lawyer or Banker is the attitude of the most ambitious people I've encountered...