Government requires coercion, if only to arrest free riding. Physical coercion alone may not suffice for this purpose, however, and ideological means may be needed as well. This basic principle underlies all government. In market economies the coercive capabilities of government may be expected to be financed out of taxes ultimately levied on factor owners' money incomes, that is, on wages, profits, and rent. On the other hand, in economies where markets have not developed due to high transactions costs individuals' contributions to the provision of public goods will take the form of payments in kind and labour services. In this case, the free rider problem suggests labourers will attempt to shirk; the government, therefore, will have to compel labourers to work and, therefore, will appear to be coercing labour even though it may only be seeking to curtail shirking.