Recently, some economic theorists have argued that efficient breach is in fact morally justified. This paper demonstrates that these arguments employ ‘chameleons’, to use a term from Paul Pfleiderer. Chameleons are theoretically interesting but patently unrealistic models which are used to draw real-world conclusions. The arguments fail once the unrealistic assumptions are removed, vindicating the common-sense notion that intentionally breaching a contract is (prima facie) wrong.
Rigoni, Adam, The Moral Impermissibility of Efficient Breach (June 24, 2016).