No one is suggesting a "Chinese" planning system - just that the planning inquiry should not extend beyond the projected construction period, typically two years. That's time to make & consider the case for traffic projections, bats, newts, trees etc without valueless procrastination.
If a such a guillotine says no then at least we will know sooner rather than (expensively) later. We cannot spend our money twice and we have a vast infrastructure "wants" list, not to mention elderly care and social housing.
The likely causes of project and cost over-runs were not usually issues challenged at inquiries, although perhaps more detailed competent debate on such technical matters could improve the Inspector's final report.
WAO