I’ll give this a kick-start by hopefully saying something more or less neutral.
Individualism or self-centeredness is not a good quality. It cuts us off from our neighbours, and in the worst case turns society into us vs. them (instead of neighbours who look out for each other. By helping each other we are helping Christ, as He said in the Parable of the Lams and the Goats).
Therefore, we can say that a complete free-market system that is reliant only upon individual decisions (where everyone has their own motives, which in pure free-market theory always boils down to simple profit) cannot be good for the greater good of society. Individuals need to therefore be guided by the social principles of the Church (and you should probably read a book or 10 to get a good explanation of that) in their actions.
But, not everyone follows the social principles of the Church, firstly because not everyone is Catholic, but secondly (and more importantly) because many other Christians follow the Prosperity gospel (also known as the “health and wealth” gospel). Because of this disparity, it is the duty of the proper authority to ensure that (at least the minimum) principles are followed by greater society (for example, to uphold the inherent dignity of a worker in their job).
I’m going to give the following analogy (and I mean analogy. I am NOT trying to equate the two issues. This is meant for demonstrative/explanative purposes only).
In our society, the premeditated killing of someone is murder. This comes from a Christian moral principle, and it doesn’t matter whether or not someone wants to believe it. Therefore, society should discourage people (using tactics up to and including punishments) to commit murder. Nobody is going to disagree with that one, and it is up to the proper authority to do so.
It is the same in economics. Since not all people are going to follow Christian social principles, it is up to the proper authority to enforce them. Now, there is a lot more leeway, but having no enforcement whatsoever and just allowing people to do whatever is going to contradict society’s duty towards ensuring social teachings are followed (unless you want to argue that there are no social principles, but I will let those people argue their case with the current Pope).