The same kinds of issues arise when we talk about whether we should improve public transport? What sort of response should we take to greenhouse gas in the case of electricity? And so on and so forth. If we are going to induce private investment, we’re going to have to either compensate the investors for the risk about adverse government decisions, by paying them a high premium, or we’re going to have to tie the hands of government a long way in advance. Neither of those things is desirable and
