What if we allow for people to do things which are morally wrong and they bring down society?

In a free society you can't bring down society like you can in a State society. Since everything is voluntary in a free society you can't use force to hurt another person. To bring down society is to initiate force and the initiation of force is a violation of property in a free society. So because of this people can't vote to have welfare and extract taxes from other people in a free society. In a free society each individual runs their own life as opposed to a collective group of people running the lives of others. This is the whole point of a free society. A free society allows for each individual to have maximum choice at all times regardless of the choices of others.