This article introduces the cascaded individual model of Post-keynesian economics. This differs from the representative agent model of the old-keynesian model mathematically and methodologically. The model builds from five assumptions containing original concepts: cascaded individuals, a social planner vs a regulator, aggregate deposits (stock) vs pyroclastic deposits (flow). Mainly, this Macro-Micro approach of Post-keynesian concepts suggests the regulation of the money flow. Then, this paper articulates fundamental concepts to solve problems of a sudden "micro" financial shock in the short run with the long run "macro" stabilization with a balanced perspective between macroeconomics and microeconomics