Who decides what excess profits are though? Our trusty Labour Government?
Banks (and businesses in general) exist to make money for their shareholders, banks especially have to be financially sound with resources to weather a downturn or else we risk them collapsing and no one wants a shaky banking system.
So a bank make $1bio profit (or ANZ $2bio), what does that figure look like when compared to similar sized banks in similar sized countries with similar operating conditions? I would also assume that if they made that $1bio in profits, there is tax on that of about $ 280mio, are we complaining about that?