In The Grumbling Hive Mandeville implies that public benefit needs private vices

In The Grumbling Hive Mandeville describes a bee community thriving until the bees are suddenly made honest and virtuous. Without their desire for personal gain their economy collapses and the remaining bees go to live simple lives in a hollow tree, thus implying that without private vices there exists no public benefit

The so-called higher virtues are mere hypocrisy, and arise from the selfish desire to be superior to the brutes  "The moral virtues are the political offspring which flattery begot upon pride." 

Among other things, Mandeville argues that the basest and vilest behaviours produce positive economic effects. A libertine, for example, is a vicious character, and yet his spending will employ tailors, servants, perfumers, cooks, prostitutes. These persons, in turn, will employ bakers, carpenters, and the like. Therefore, the rapaciousness and violence of the base passions of the libertine benefit society in general.

https://en.wikipedia.org/wiki/Bernard_Mandeville