The free rider problem is an issue associated with the free market system that affects the overall efficiency of the market. It occurs when free riders, or individuals who benefit from a certain shared resource but do not pay their fair share of the costs of providing it, are able to take advantage of the resource. This results in an inefficient allocation of resources because some members are not contributing towards the costs, thus leaving a gap between the cost and the total benefit yielded.

The free rider problem is particularly problematic when it comes to public sector projects. Since public sector projects are provided without any profit motive, market incentives for cost protection are much more limited. As a result, it is much easier for free riders to freeload off the shared resources.

The result of the free rider problem may involve higher taxes, uneven distribution of resources, and a lack of proper stewardship over natural resources. Furthermore, those individuals or entities taking advantage of the resource may be functionally exempt from the costs associated with producing it. This causes economic inefficiency, as those bearing a disproportionate share of the costs are essentially subsidized by those taking advantage of the resource without contributing their fair share.

There are a few strategies that may be employed to prevent the free rider problem. Firstly, charges may be introduced on the use of the resource or service. This can encourage individuals to contribute their fair share of the costs. Secondly, the resource or service being provided may be made freely available to all users, thus removing any cost barriers to access. Finally, individuals, companies or organizations may be organized into cooperatives or organisations with collective responsibility for production and costs.

In conclusion, the free rider problem is a major issue in free market systems and can lead to a number of significant economic and social inefficiencies. Governments and policy makers must be aware of this issue and strive to implement strategies that can prevent it from occurring. If appropriate strategies are implemented, raising awareness among the public and promoting cooperation, then the efficiency of the free market system can be maintained.