Of course he has to step down
He is well aware of the risk he took that the media might find out he is on the HASC a senior role with far
more influence than a back bencher.
This isn't simply about a public figure caught with his pants down its that he is paying for sex, drugs that are illegal he was happy to pay for and allow in his property, and his terribly poor judgement of the situation he was getting himself into was lead by his desire for paid sex
He has been on the committee that is looking into drug and prostitution laws what was he doing some practical research. it's a conflict of interest and he took that risk
I really feel sorry for his wife and children