Think tanks have today called on the government to radically rethink its drug policy, as it was revealed that taxpayers could save nearly £900m a year if cannabis was legalised. A report by the TaxPayers' Alliance (TPA) argued that legalising the drug would reduce spending by police, prisons, courts and the NHS and put a huge amount of money back in taxpayers' pockets. The health service would gain the most from such a move, making back £132.6m from not prescribing sleeping tablets, pain-relief medicine and anti-depressants which had been given out as a result of patients smoking higher-potency 'skunk'.