Toorak isn't representative of Prahran, it's only one small pocket covering four blocks in the area between the river, Malvern Rd in the south, Williams Rd in the West and Kooyong Rd in the East and since many of the blocks are very large I'd guess there are only a few thousand people living there.
The suburbs where the Greens are dominating are well heeled, to say the least, the reason that working class people don't vote Green is that they don't agree with their policies and do agree with Labor or the Liberals.
You've said it yourself, "educated" people who "think" vote Green, if that's not an elitist attitude I don't know what is.
The Greens are slaved to a narrative rather than committed to a policy platform, it breaks that narrative to address the real world problems faced by people in low socio economic circumstances.

Jay I fail to see how it is elitists to say that Green voters are educated people who think about issues. Where there is a body of support among both Labor and Liberal voters of people who simply vote for that particular party simply because they always support that party, rusted on voters. The perception, rightly or wrongly, among working class people is Labor will serve their short term interest better that the other mob. Business people in the main see the Liberals as serving their narrow short term interest.
Who's interest does your party serve? With a minuscule vote I can't see them serving anyone's interests except the bigoted lunatic fringe dwellers.

Totally agree, Jay.

The elitists (social climbing narcissists) are always telling us how educated they are.