There is a whole literature on these questions. To favour a looser structure for the sake of being able to recruit workers is short sighted. Loose standards of discipline in a revolutionary organisation make it uninhabitable for workers. But the answer is a regime where discipline and reliability are demanded and ensured on the basis of education and rational political perspectives. Where there is no adequate education, and no system of generally enforced and understood norms, discipline becomes an arbitrary and subjective matter.
Inefficiency leads to more waste of effort through recriminations.
Such a regime is uninhabitable for most workers. Section III Youth work is a crucial area for recruitment. We cannot confine ourselves to the established activists. We must be constantly looking to new struggles and new activists coming from them. This demands a disciplined organisation.