Was about to say the same. Haven't PhD students usually done tutorials and supervised labs to undergraduates for the extra cash. Certainly was the case in my electronics undergrad course a few decades ago.

> in 2023-24 one in five tutorials (20%) were taught by hourly-paid tutors – typically PhD students or academics at the start of their career.

Depends on the university. 25 years ago now but a number of the PhD students I worked with had mummy and daddy paying for everything. One enterprising guy had a side business selling cocaine. Most were slumming it in house shares and taking on casual work. Only the blessed had teaching appointments. I was blessed until I realised it was a curse.