Given that the government will pay back significantly MORE money to PFI, than they borrowed. Then PFI is a way of funnelling long term cash into private organisations....
Bonds are much lower interest than PFI and PFI tends to be local to the country and not international like bonds.
You are correct that the mess BB made of our country is nothing to do with the EU. The EU just made it easier for them to make a mess of us....