Ludwig Von Mises said this quote
“ That policy which aims at raising the objective exchange-value of money is called, after the most important means at its disposal, restrictionism or deflationism. This nomenclature does not really embrace all the policies that aim at an increase in the value of money. The aim of restrictionism may also be attained by not increasing the quantity of money when the demand for it increases, or by not increasing it enough. This method has quite often been adopted as a way of increasing the value of money in face of the problems of a depreciated credit-money standard. ”