That is precisely what the Tories did. PPP gives a guaranteed cashflow investment into public services. That is one of the key benefits. With bonds, issues arise about different values and risks that may affect investment flows over time. That is something to be factored into the various considerations.
Different people make different assessments.
Such analyses are professional, but they are contentious. I make that point because the hon. Member for Brent, East listed people who had adopted a different argument. Members have dwelt on safety, an issue that is important to us all. The first condition of safety is investment now.