Community generated land values

From City AM 14 May 2012:

Just six per cent thought Hollande would boost stability in the single currency bloc while 18 per cent said his election would have no effect.

But Hollande’s eye-catching pledge to tax those earning over €1m at 75 per cent could be good news for London’s prime property market, our panellists said. Sixty-eight per cent said they thought French millionaires would likely move to London to avoid the tax, against 29 per cent who thought such an exodus was unlikely.

From City AM 16 May 2012:

Land Securities, the biggest listed British property developer, said demand for office space in London was lower than expected due to the worsening turmoil in the Eurozone.

The joint developer of the Walkie Talkie skyscraper in the City of London financial district said on Wednesday firms were delaying moves due to economic uncertainty.

Can anybody seriously say that the extra profits on residential are in any way earned, or indeed that the fall in profits on commercial is in any way 'earned', or are these changes down to impact of 'the community' in its widest sense?