The situation with this method is that it is impossible to separate oneself from culture since it permeates our thinking and language, actually it is the maximum amount of about us because it is inside our heads. Nevertheless it could be possible to help keep some wicked aspects of culture out of our towns by separatism, we can not clear ourselves of our personal predisposition to sin.
If the Amish stay apart from state institutions or from mainstream engineering and consumerism, all they achieve performing is producing sub-cultures that while they might be counterculture, never attain to acultural status. The fact that a monastic life style usually expected many principles and kinds of discipline is proof enough of the inherent inclination of person to fall into previous styles of sin. Because of this, separatist groups tend to stick to levels of holiness that can just be maintained through works. Claiming that the monastic living cause greater holiness is the reason why Luther claimed so it was not only unwanted but, if it was picked for this reason, it would become a company of the demon! the mystical christ
Separatism also just emphasises Christ's position in pulling us from tradition (the straight dimension) but ignores God's role in our continued relationship with culture (the outside dimension). If Tolstoy was correct, a Christian must pay no taxes, something which Jesus Christ claimed we should do. Jesus also shows us to love our neighbours, that are for probably the most, part present in popular lifestyle where realistic works of love have to be culturally highly relevant to the people who need God's love to realize it as such.