Keg - that was the Action Buses case. The TWU claimed in some cases two thirds of the pay was deducted. But as you say, FWA ordered that 20.1% of pay be deducted. FWA said:
the payments to drivers implementing the partial work ban should be decreased by an amount which reasonably approximates to the percentage that fare collection revenue represents of ACTION’s total expenses. According to the submissions of ACTION this formula would result in the total payment made to each driver for each shift in which the ban is imposed being reduced by 20.1%.
Dutchroll - Agree. I guess that is why bans can be so effective....