On the other hand, it is extremely difficult for an outside observer, looking at the results of the New Approach, to judge whether it is not scaling well becaus

On the other hand, it is extremely difficult for an outside observer, looking at the results of the New Approach, to judge whether it is not scaling well because of a lack of funding or because it fundamentally does not scale well. It can also be challenging for the people involved to realize that their approach isn't working (cf. "sunk cost fallacy", "it is difficult to get a man to understand a point when his salary depends on him not understanding it", "confirmation bias"). Often, the approaches are not necessarily poorly funded but rather inefficiently managed - education and healthcare would be the prime examples in the US context. The US spends a roughly approximate amount of its public budget on healthcare as the UK does. At other times, advocates for an approach to solving a social issue are ideologically motivated more than results-oriented. A case in point is the difference between LA's approach to the homelessness crisis and NYC's take (https://public.substack.com/p/three-times-more-homeless-die-under?s=r https://public.substack.com/p/three-times-more-homeless-die-...)