Possible Clues:

• Country with lower levies
• Green shelter?
• Cayman Islands, e.g
• Stress port as an option, if you want to keep more of your income
• Country where corporations (and the rich) pay little directly to the state
• What quiet Axminster offers as a place for dodgy financiers?
• Man's one kid gives nothing away after test
• Refuge for rich people escaping Revenue Commissioners