This paper discusses a shift in contemporary ideological justification and its implications for the critique of ideology. Traditionally, the critique of ideology aimed to dispel ideological illusions. However, it has become increasingly challenging to pinpoint these illusions. Instead, ideological justifications hinge more than ever on functional necessities, presenting themselves as the sole practical solution to a given problem. I argue that ideologies of functional necessities pose problems for the established standard model of ideology. In section 1, I discuss the standard model. In section 2, I introduce the “functionalist challenge” to the notion of ideology and lay out my reasoning for the contended inefficacy of simply dispelling ideological illusions. In section 3, I discuss the resulting problems for a critical theory of ideology and possible ways to address them.