Some economists posit that the minimum wage is in part to blame for structural unemployment, although structural unemployment does exist even in the absence of a minimum wage. They assert that because the governmentally imposed minimum wage is higher than some individuals' marginal revenue product in any given job, those individuals remain unemployed because employers legally cannot pay them what they are "worth." Others believe that in such cases (for example, when a person is intellectually disabled or suffers a debilitating physical condition) it is the responsibility of the state to provide for the citizen in question. When a minimum wage does not exist, more people may be employed, but they may be underemployed and thus unable to fully provide for themselves.