Jabird
The point is that the risks of building in the Thames, contrary to what Silver would like us to believe, are unknown.
Cods. As was pointed out previously, the Dutch have been doing it for centuries. Amsterdam is built on wooden piles, which appear to be still doing their job even after a few hundred years.
And regards giving the Q.E. to the banks. This simply rewarded the very people who had made the worst decisions, thereby eliminating 'moral hazard'. It means that as a banker or investor, you can be as incompetent as you like and the government (the people) will bail you out.
In addition, this is throwing good money after bad, so it does nothing for the economy. Had that £350 billion been thrown at infrastructure and R&D projects, there would be a million people involved in building things that will be useful (and wealth generating) for the next hundred years.
Instead it was given to the banks and the banksters, who tuck the money away in tax havens, or spend it fast cars, yachts, electrical gizmos etc: This, of course does nothing for the UK. the UK doesn't make anything, so this spending provides no employment, no taxes, and simply worsens an already woeful balance of trade.