Called Qantas. My work told me they had a full economy ticket but this wasn't correct. It was a flexible discount economy, so the SC points are correct.
Thank you for the replies to my misguided question.
Travelling Sydney > Tokyo > Sydney, the points calculator on the QF site states that 140 status credits can be earned on an economy ticket.
However, for the last trip (full economy) I was only credited with 35 SCs each way. Due to the return flight being full, an upgrade to business was a...