A cynic might suggest that proposing an innovative walkway scheme could be a wonderful example of the type of misdirection used by magicians who wish to draw attention from an important issue - maybe in this case the height of the proposed buildings.
And the solution to the urban blight of Vauxhall is not a sticking plaster walkway over the top but a major operation to cut out the needless use of the private motor car in Central London (and let's be clear, with the American Embassy, Battersea Power Station Development et al this IS Central London now).
I hope the Vauxhall, Nine Elms, Battersea Opportunity Area Planning Framework will force a proper resolution of this issue throughout the area. I have my doubts, not least because, mindboggingly, the Vauxhall Gyratory isn't included in the area!
I urge you to write to your MP and Councillors, and to Transport for London, making it clear that you consider the continuing dominance of the single occupant motor car, blighting this area, to be completely unacceptable.