&gt; We take measures to mitigate those risks like putting locks on our doors. That does not denote a market failure. Measures taken to mitigate crimes against us surely cannot be considered paying for something you do not use.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Market_failure" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Market_failure</a><p>&gt; In economics, market failure is a situation in which the allocation of goods and services is not efficient. That is, there exists another conceivable outcome where an individual may be made better-off without making someone else worse-off<p>The store AND the consumers will be better off if a police force stopped the thefts.<p>This is the very definition of a market failure.