* Says tax on world financial transactions excellent idea
* Says idea needs work, not viable in current form
* Says support for idea in different parts of Europe
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MADRID, Sept 18 (Reuters) - A "Tobin tax" on world financial transactions is an excellent idea but needs work before it could be put into practice, the European Commission's top economic official said on Friday.
"Putting a tax on international financial transactions seems a very sensible idea to me," said Economic and Monetary Affairs Commissioner Joaquin Almunia. "I think that for it to be feasible it will need work," he said at a breakfast meeting, adding that in Europe he had heard "many voices in favour".
French Foreign Minister Bernard Kouchner has suggested such a tax to fund development, despite a recent rejection of the idea by finance minister Christine Lagarde.
Kouchner told business daily Les Echos on Thursday that British Foreign Minister David Milliband was also in favour of the idea, which would meet with stiff resistance from financiers. Kouchner said a tax of 0.005 percent on financial transactions could bring in 20-30 billion euros ($29.40-$44.10 billion) a year for development.
U.S. economist James Tobin was the first to suggest a tax on currency trades as a way of reducing speculation and volatility. (Reporting by Jason Webb; editing by David Stamp)