Would a global 10% income tax (global flat rate) help world wide economy to recover?

Would a global 10% income tax (global flat rate) help world wide economy to recover?

There exists 51 offshore financial centres with almost 0% income tax on planet earth:

Andorra, Anguilla, Antigua and Barbuda, Aruba*, Bahamas, Bahrain, Barbados, Belize, Bermuda, British Virgin Islands*, Cayman-Islands, Jersey and Guernsey, Cook Islands, Dominica, Dubai, Gibraltar, Grenada, Hongkong**, Ireland**, Isle of Man, Jordan**, Libanon**, Liberia, Liechtenstein, Luxemburg**, Macao**, Maledives, Malta, Marshall Islands, Mauritius*, Monaco, Montserrat, Nauru*, Netherlands Antille, Niue*, Panama, Samoa*, Seychelles*, St. Kitts and Nevis, Saint Lucia, St. Vincent and die Grenadines, Singapur**, Switzerland**, Tonga*, Turks- und Caicos Islands, Vanuatu, Cyprus

* - only on the list of OECD
** - only on the list of Diamond and Diamond

The global 10% Income tax would help to bring back hidden money from corporate havens and offshore financial centres to invest it again into global economy-, trade- and financial system where it would create jobs, well fare and prosperity.

Each person or company would pay its 10% income tax in their country of birth. Just a beautiful thought or reality soon? Lets join forces and work together for a better world

What is your opinion about? Would you help to promote this idea?