The young apprentices surrounding Bernadino clearly held no respect for him.
"After all, mere bad background or desperation in joining the Tower of Black Radiance as a teaching assistant should have been enough. Eventually, they would either become his peers or just strangers passing by.
Indeed, being an 'unnamed apprentice' was itself considered a job.
If being a teaching assistant could be considered a formal job, then an 'unnamed apprentice' could be seen as a 'temporary teaching assistant.' Although they had to undertake some relatively dangerous 'teaching missions,' they still got paid.
Moreover, because the teaching missions they undertook were dangerous, there were some additional allowances. Eventually, their income would even slightly surpass that of the teaching assistants.
The Tower of Black Radiance did indeed have some apprentices who were truly penniless, yet possessed a strong 'desire to ascend.'