The most controversial form of parsimony - as an expression of postmodern neo-reductionism - is the construction of analyses in the self-sufficiency of mainstream theory hypotheses. The extension of the scientific community which practices the ideas of this theory, whichever it may be and whenever it would have found itself in a leading position, was an exaggeration through both references (favorable or not) as well as through the flux of approaches which configure economic policies. Methodological conventionalism produces simplification, but when it stems from a single theory it reaches excessive forms.