There goes civilisation...

I have always believed that anyone who owns more than one house in one Country should pay 100% tax on any profits made and on any capital gains, rent or whatever. That would sort out the greedy bastards

Yes you can, if they turn around and blame the less well off for not being able to purchase something that the behaviour of the wealthy has denied them.

Five houses, where families could live is a bit different to five bicycles, don't be so flippant.
Just because you can buy five houses doesn't mean it is moral to do so.