are against the current monetary system, there is disagreement as to whether or not there should be a monetary system. Alexander Berkman was an anarchist against the monetary system. In his book What Is Anarchism?, Berkman argues that in an anarchist society money would become unnecessary. Within anarchy, all occupations are viewed as equally beneficial to society. Since the concept of value is different for everyone and cannot be determined, it is argued that it should not be set and one's contribution to society through their occupation entitled them to be a part of it. Within this system, there is a free distribution of goods without the need for money. Money in its current form is a hierarchical system, the exception being when all people are paid equal salaries. The argument goes further to question the purpose of money if people are paid equally. Those who agree with this would also note that a monetary system would open a vulnerability for some to acquire more of it and create a class system. Some individualist anarchists and mutualists do not oppose the idea of money and see currency as a tangible form of workers receiving the full product of their labor. They support mutual banking (some individualists support no banking at all to keep exchange rates constant) and local currency as opposed to national currency. Others see money as simply an index for exchanging goods and that its existence would not necessarily create a class system. Some market abolitionist anarchists argue that while supporters of capitalism and the Austrian School in particular recognize equilibrium prices do not exist, they nonetheless claim that these prices can be used as a rational basis whilst this is not the case, hence markets are not efficient. Anarchists such as Rudolf Rocker argued that a state is required to maintain private property and for capitalism to function. Similarly, Albert Meltzer argued that anarcho-capitalism simply cannot be anarchism because capitalism and the state are inextricably interlinked and because capitalism exhibits domineering hierarchical structures such as that between an employer and an employee. The anti-capitalist tradition of classical anarchism has remained prominent within post-classical and contemporary currents. Anarchists are committed against coercive authority in all forms, namely "all centralized and hierarchical forms of government (e.g., monarchy, representative democracy, state socialism, etc.), economic class systems (e.g., capitalism, Bolshevism, feudalism, slavery, etc.), autocratic religions (e.g., fundamentalist Islam, Roman Catholicism, etc.),