Welcome to Spain, We are Going to Demolish Your House

During the last 40 years of the mad housing boom along the spanish coasts, many many houses were built by corrupt builders who bribed the local mayors to look the other way or to approve illegal buildings. This was OK while nobody was really interested but suddenly after many corruption cases the regional government has done a survey and found 10's of thousands of illegal houses and other structures all over the place, so they have now issued demolition orders for hundreds of the houses, doesn't matter who is living in the house, most likely a foreigner mostly Brits and Germans, these owners bought these properties with all legal documents and no hint that something was wrong, but now that some local official deems the property to be illegal, how can they do that, it is a criminal attack on law abiding citizens who bought in good faith and the corrupt ones are long gone with the money and no sign of them getting legal action against them, I am not sure what is prompting them to do this right now, it is a very silly act as all it can do is make it less likely anyone will buy in spain if this could happen to anyone. They should legalise all these structure and try and track down all the corrupt builders and mayors to make them repay some of the huge amounts of money they all made, not the poor retireees who saved all there life to see there lovely villa demolished without compensation.