An insider accused the agency of failing to scrutinize a lucrative tax break in Puerto Rico designed to lure wealthy Americans to the island. Tax Evasion, Capital Gains Tax, Tax Credits, Deductions and Exemptions, Whistle-Blowers, Frauds and Swindling, Internal Revenue Service, Puerto Rico, High Net Worth Individuals An insider accused the agency of failing to scrutinize a lucrative tax break in Puerto Rico designed to lure wealthy Americans to the island. NYT > Business