そうは問屋が卸さない

Japanese

そうは問屋が卸さない、そうは問屋がおろさないそうはとんやがおろさない同音

exp. idiomatic things don't work that well in the real world; things seldom go as one wishes; that is expecting too much; it won't be that easy; (literal) the wholesaler won't sell it like that