Islam acknowledges right to ownership of all types of property acquired by lawful means. The Sovereign however is absolute titleholder over all wealth and property on earth. Society may decide workable mode of wealth distribution, whether the welfare system, principled market system, collective control system or their combinations. In all cases distribution objective must be divinely complaint and state must make provisions for the needy and helpless. Without which society fails its test as responsible and just.
In addition, if Mr. Kianusch has two houses and donate one to the needy, the best is conferred upon him than the chances of any greater benefit derived from debating the issue. Selflessness is not a complex philosophical matter.