They add the tax after the fare is showen.
Just say a fare for ORK - XXX is €36.20, then Wizz add €10 "Goverment Tax" and (Cork) Facility Chrage €5.96. Total tax is €15.96 when Wizz should only be charging €8.96 in tax.
They are under no obligation to lower fares but they can't over charge on taxes and then miss lead the passenger by claiming the whole €10 is going to the Goverment.