> Consider laws restricting how many houses a person can own, or maybe an increasing property tax on each unit. These are good solutions.

So they set up a company and buy the property using the company. Pressure is always the answer, whichever tactics are used.

I understand the issue in Mallorca after visiting Mabella. Also the locals don't have to live on a holiday island, but they can elect pressure the speculators and their clients. Somehow this doesn't happen in Greece.