&gt; This means you have people living in Sydney with multi-million dollar properties - which are just modest houses in now-desirable suburbs - who haven&#x27;t paid any property tax since the 60&#x27;s, and who can&#x27;t move anywhere because they&#x27;d be up for so much stamp duty in one hit (easily 50-100k).<p>I don&#x27;t understand.  When you&#x27;re making millions on the sale of the property, how is 100k in stamp duty a problem?  It&#x27;s on the same order as your agent&#x27;s commission!