2 on the flight deck
The commercial implications of this knee jerk decision will be significant. Sydney to Melbourne at any time for example (consider breakfast when nature may be a little more likely to call), pilot calls cabin advising need for a visit. Extracting a crew member from the flat out service schedule must have an impact on the inflight product.
Secondly, sole pilot remains, supposedly looking forward at the instruments/windshield at all times whilst cabin crew member grabs crash axe or an oxy bottle to use as a weapon on the guy who still needs to pee.
Or they use one of the self defence techniques taught in their security training to disable the remaining pilot.
Or they use their belt to strangle remaining pilot.
Or they bring a utensil from the..........
Well thought out minister (and airline management).