The Prime Minister says some of the tax avoidance schemes being used by wealthy individuals are "dodgy" and morally wrong.
Ronnie Ludwig, a partner at Saffery Champness accountants in Edinburgh, told the Today programme that he doesn't "sit in judgement" of his clients' moral values.
He concedes, however, that some of the schemes "are at the ragged edge and could be said to be abusive".
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