Almost three years after UBS, Switzerland’s biggest bank, paid a $780 million fine for helping Americans evade taxes and agreed to hand over the names of more than 4,500 American account holders, the Swiss banking industry refuses to exit the business of tax evasion. And the Swiss government still insists on protecting it from scrutiny. The United States should not compromise in pursuing the data it needs on American tax cheats.

American authorities are rightly putting pressure on the Swiss. Last week, prosecutors from the United States Attorney’s Office in Manhattan indicted Wegelin & Company, Switzerland’s oldest bank, accusing it and three of its employees of helping American taxpayers hide more than $1.2 billion. Wegelin is scheduled to appear in Federal District Court on Friday.

Wegelin went so far as to lure some 70 former UBS clients, claiming to be a safer option because it didn’t have offices in the United States, according to the indictment. A Web site that pitched Wegelin’s services boasted that “neither the Swiss government nor any other government can obtain information about your bank account.”

More indictments could come. The Justice Department is investigating at least 11 Swiss banks that allegedly helped Americans avoid taxes, including those that doubled down on the business after UBS ran into trouble. The department has not disclosed their identities, but according to press reports, the list includes Credit Suisse, Julius Baer, the Basel Cantonal Bank and Zurich Cantonal Bank.

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The United States would like details of all secret Swiss bank accounts used by Americans to evade taxes and has been negotiating with Switzerland to get the data for months. But the Swiss government has been dragging its feet. According to the Swiss press, the government has demanded that the United States waive criminal prosecutions of the banks, which hold between $680 billion and $800 billion in secret assets from around the world.

Last week, Swiss banks gave American authorities encrypted data about bank employees who served Americans suspected of tax evasion. But the Swiss government said it would provide the decryption key only if it reached an agreement with the United States. Switzerland would prefer that its banks simply withhold tax on deposits and remit the money to the proper tax authorities without identifying the clients. It made such agreements with Germany and Britain, but those have been harshly criticized in Europe as inadequate and might yet fall apart.