We do not currently know of any antonyms for paradox of thrift.
The noun paradox of thrift is defined as:
A paradox of economics, stating that an increase in autonomoussaving leads to a decrease in aggregatedemand and thus a decrease in grossoutput which will in turn lower total saving: narrowly speaking, total saving may fall because of individuals' attempts to increase their saving, and, broadly speaking, increase in saving may be harmful to an economy.