This is by no means limited to Australia:<p><a href="https://en.wikipedia.org/wiki/Immigrant_investor_programs" rel="nofollow">https://en.wikipedia.org/wiki/Immigrant_investor_programs</a><p><a href="http://www.bbc.com/news/business-27674135" rel="nofollow">http://www.bbc.com/news/business-27674135</a><p><a href="http://www.bloomberg.com/news/articles/2015-03-11/passport-king-christian-kalin-helps-nations-sell-citizenship" rel="nofollow">http://www.bloomberg.com/news/articles/2015-03-11/passport-k...</a>
If you're rich, America won't let you out, see [1]. If you don't plan on expatriating make sure you understand the difficulty you will face with overseas banking, see [2].<p>[1] <a href="http://www.irs.gov/Individuals/International-Taxpayers/Expatriation-Tax" rel="nofollow">http://www.irs.gov/Individuals/International-Taxpayers/Expat...</a>
[2] <a href="https://americansabroad.org/issues/banking/" rel="nofollow">https://americansabroad.org/issues/banking/</a>