Massive generalisation, like saying all teachers are good or bad at their job etc....
Things like PFI deals are only as good as the person from the public body arranging them / agreeing to them. There is a danger that someone agrees a deal which isn't good value for money to the public (like the new airport built in Scotland by PFI (when Labour were in power) where it cost several times more than it should and they gave away the rights to collect an income from the commercial space to the financiers too) it comes down to how much the individual cares about getting the very best deal that can and treating public money as something they need to be very frugal when spending, or if they think oh well it's not my cash and it makes no difference to me how much we end up paying (a lot of budgets exist and if not used, are lost so why get maximum value for money throughout the year only to have an excess that you have to spend on stuff you don't really want because you won't get the same budget the following year)
Like in all walks of life, and both private and public areas, there will be good and bad examples and it can / will vary dramatically as it relies on people
Fair enough, do you think, overall, the banking sector has made a positive or negative contribution to the global economy over the last decade?
On a similar note, do you think doctors have made a positive or negative contribution to the global economy over the last decade?
As far as PFI is concerned, I think it's a rip off, and it's been a 'product' dreamt up by the banks and enthusiastically endorsed by politicians as it provides off balance sheet financing of public sector debt, which will be paid for by future generations. Both Labour and the coalition have been complicit in this.