听力原文： A United Nations report to be officially released later today will condemn the Zimbabwe government's mass demolition of shantytown homes as disastrous. UN officials say more than two hundred thousand Zimbabweans have lost their homes although others put the figure much higher. The report was compiled by UN special envoy A. who spent two weeks in the country seeing the demolition first hand. Here is our UN correspondent S.P.. According to those who have seen it, the report says that more than two million people have been affected by the deliberate campaign of torching and bulldozing large areas of shantytowns. President Mugabe's government says the demolitions are meant to clean up Zimbabwe's towns and cities, tackle black market trading and ensure building regulations are observed, but critics have suggested that the campaign is to punish urban voters who support the opposition. Which of the following is NOT included among Zimbabwe government's explanation of the mass demolitions?