New tax on banks

this weeks media has brought to attention the problem of the'' new'' tax ,,what it means and how to manage it .... the biggest danger is the potential to increase it where ever and by what ever.in the future ,,this will be seen as a cash cow in the future ,, if it is a one off it is manageable ===== if it $6.2 billion and comes off top line..[gross earnings ] then with company tax of 30% reduces by $1.86 billion,,,,, bad but not that bad ,,this is''' not'' portrayed by both sides ..but as we know once up and running its here to stay , but with near certain chance of being increased as needed ,,as the media hates banks , also banks which I hold shares in.. 2 have not been good corporate businesses .. any thoughts