In 2017, the Australian Law Reform Commission recommended a harmonisation of powers of attorney across the country, something Dr Patterson has spent years arguing for.
And yet, she says Australia is "dragging our heels".
"The attorneys-general across Australia … all say, 'Yes, it's a good idea', but it's very, very slow. It's moving at a glacial pace and I really wish it would speed up."
In the meantime, to ensure that — young or old — your wishes are carried out, especially in the event that you lose capacity, planning ahead is "absolutely vital" and "the best way of looking after ourselves", Dr Patterson says.
"People need to have their documents in place. Because you should decide who decides for you if something happens."