Greyworld artist Andrew Shoben has recently made a programme for Radio 4, Change of Art, where he discusses whether art in public spaces could be rotated, and when it should be decommissioned.
He talks to Wilfred Cass at the Cass Sculpture Foundation, artist Antony Gormley, Sandy Nairne from the National Portrait Gallery, and a local authority public art officer to get their views.
Like many of these public art - focused programmes, it goes round and round in circles whil remaining essentially inconclusive, but it is worth a listen nonetheless.
The local authority officer interviewed fails to take account that a lot of public art commissioned is not publicly funded, as it is funded by the developer as part of a section 106 agreement.
You can listen to the programme on the iPlayer at: http://www.bbc.co.uk/programmes/b015zm9b