The numbers are both striking and significant. In 2009 and 2010, 231 high income earners signed up to one of the biggest Irish offshore tax schemes in a generation. The scheme involved 27 separate syndicates, each of which traded in financial instruments through a series of shell companies in the Caribbean. According to Revenue, the scheme was outside the scope of what is acceptable and raised assessments against the transaction.   Of the 231 individuals, 14 had settled with the Irish tax authority as of last year. The 14 have combined tax liabilities of €1.9 million, records show. Others, however,…