The first world tax

I don't know if anyone saw this article. I found the link on Drudge...
http://www.guardian.co.uk/global/2010/apr/20/imf-tax-global-banks
They (the G20) are seriously considering implementation of the first world tax. Tax those obscene profits of banks! Do people really not understand that these taxes really will come from those who use banks and banking services? (i.e. nearly everyone)
This is just more re-distribution of wealth and its not even hidden. The UK paper refers to it as a Robin Hood tax and mentions how anti-poverty groups are chomping at the bit.

If you want to get your country and its people out of poverty, stop fighting and start producing. There are a lot of charitable people who would voluntarily share their money with you if you show an ability to put it good use.

My big question is who exactly gets to decide what is done with this money? From what authority do they derive that ability? I'm not a conspiracy theorist but I do think there is a critical mass of people in the world who believe in oligarchy - rule by the elites who know best.