Advocates of free-market socialism such as Jaroslav Vanek argue that genuinely free markets are not possible under conditions of private ownership of productive property. Instead, he contends that the class differences and inequalities in income and power that result from private ownership enable the interests of the dominant class to skew the market to their favor, either in the form of monopoly and market power, or by utilizing their wealth and resources to legislate government policies that benefit their specific business interests. Additionally, Vanek states that workers in a socialist economy based on cooperative and self-managed enterprises have stronger incentives to maximize productivity because they would receive a share of the profits (based on the overall performance of their enterprise) in addition to receiving their fixed wage or salary. The stronger incentives to maximize productivity that he conceives as possible in a socialist economy based on cooperative and self-managed enterprises might be accomplished in a free-market economy if employee-owned companies were the norm as envisioned by various thinkers including Louis O. Kelso and James S. Albus.