So many super-rich Americans evade taxes using offshore accounts that law enforcement cannot control the growing misconduct, according to a Senate report that provides the most detailed look ever at high-level tax schemes. Cheating now equals about 7 cents out of each dollar paid by honest taxpayers, as much as $70 billion a year, the report estimated. The universe of offshore tax cheating has become so large that no one, not even the United States government, could go after all of it," said Sen. Carl Levin, D-Mich., whose staff ran the investigation. The report details how the Quellos Group, a tax shelter boutique based in Seattle, "concocted a tax shelter" using $9.6 billion "worth of fake securities transactions that were used to generate billions of dollars of fake capital losses." When investigators asked for trading records, Levin said, they were first told the trades were private, over-the-counter transactions. He said investigators asked for trading tickets or other evidence of who owned the $9.6 billion worth of stock and were told the stocks were never owned by the parties involved. "They just wrote down numbers on paper and claimed losses," he said. "It was just like fantasy baseball, except the taxes not paid were for real."