If the goal is to have a diverse economic mix of people to live in a city center, then let the results speak for themselves. If another city has the same goal a

If the goal is to have a diverse economic mix of people to live in a city center, then let the results speak for themselves. If another city has the same goal and can achieve a better result with less resources then that’s worth considering. The “they haven’t thought this through all the way” mantra you’ve espoused might be true. Also maybe you’ve not thought it all the way through. Maybe that has been tried and doesn’t work well for reasons. For example if you increase the flow of money into a market without increasing supply, prices tend to rise and the wealthier will absorb the rise better than the poorer. As you’ve helpfully pointed out, there are knock-on effects, however those effects don’t just apply to one side. So that’s why I advocate for aligning and judging success on the goal and comparing like to like.