Ann: Annual Report to shareholders-MNM.AX, page-15

In very round figures...

The Basic Wage in 1960 was 13 pounds and 16 shillings for 40 hours.
Say $28 ? So about 70 cents per hour.

So the lowest paid worker needed to do 50 hours for 1 oz of gold.
(Assuming that the USD and the Australia dollar (to be in 1966) were at parity.)

The lowest paid worker in 2016 gets $17.70 per hour so he/she needs to put in 100 hours
...so about double... to get 1 oz of gold.

Now I know that these figures are, at best, "around about."
But they give some clue to the relative strength of wages to the gold price.

I would be very happy for someone to get the figures to a more precise number.