The sort of feedback loops you're talking about aren't really that difficult to analyse. They're just complicated. The difficulty is that, as you refer to, the

The sort of feedback loops you're talking about aren't really that difficult to analyse. They're just complicated. The difficulty is that, as you refer to, the political climate makes it difficult. The specific difficulty I see is that it's politically impossible to try a policy out and then tweak it quickly if it turns out to be necessary to do so. Accurate and timely data collection to be able to do so is also a big issue, and it's one I'd rather see more budget allocated to.