THE European Commission is to demand direct taxation powers to generate one third of the EU budget by 2020 under proposals that will impose ?3billion a year in "stealth taxes" on Britons.  The measure would add an extra tax burden to the average British family of more than ?200 a year for the EU financial period 2013 to 2020.  Janusz Lewandowski, the European budget commissioner, wants tax-raising powers to shift EU funding from national government transfers to taxation on ene