Final answer:
Open-mindedness is essential when enacting ladder of opportunity policies because they may be too costly, might not yield positive outcomes, and may not always benefit the less advantaged as intended.
Step-by-step explanation:
Policies aimed at creating a ladder of opportunity should be approached with open-mindedness for several reasons. Firstly, such policies might turn out to be too costly to implement on a large scale. Secondly, while these policies aim to equalize society, it's important to acknowledge that they may not always show positive results, hence the need for a flexible and evaluative approach. Lastly, it's understood that while the intention is to benefit the less advantaged, not all initiatives will be beneficial or sustainable in the long term. Therefore, ongoing monitoring, adaptation, and evaluation are crucial.