From my POV,
Strict laws must be implemented with heavy fines and punishments. Also, TTE Staffs must focus more on ticketless passengers and Railways should put pressure on them to control the movement of ticketless passengers. Of course, we don't have that much manpower to control these many passengers. But RB should focus on this and hire more manpower to control this.
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They should bring a system like in metros. If there's no ticket, then no entry inside the premises. Also, they need to increase the SL & GS coaches or atleast introduce new Amrit Bharat trains.
To conclude this, heavy fines, severe checkings and Metro-type systems will create a fear in the ticketless passengers' minds and more focus on AB trains will be helpful for those passengers.