Overall, I’d say that, if anything, social scientists perhaps don’t spend enough time re-confirming the definitive statements. There’s a real push toward novelty, to the extent that maybe we don’t have enough “gold standards” of well-established social patterns.
We’d need grants specifically for confirming/falsifying prior experiments.
The Scientific Illusion in Empirical Macroeconomics, Lawrence H. Summers The Scandinavian Journal of Economics, Vol. 93, No. 2, Proceedings of a Conference on New Approaches to Empirical Macroeconomics. (Jun., 1991), pp. 129-148