Why should property insurance be any different than health insurance?

As Michael Moore's film Sicko showed us that one of the methods that health insurance companies utilise to maximise profits is to ensure that claims do not get paid. Should we expect any less from property insurers? The American Association for Justice has released a report chronicling how insurance companies worked to prevent payment of legitimate claims post Hurricane Katrina. The complete report, entitled "Pattern of Greed" (PDF), is to be found here.