People don't always make the rational choice for long term benefits when there are short term gains to be had. Individuals, thanks to bounded rationality, tend to seek satisfactory solutions, not optimal ones. It takes coordinated effort to find optimal solutions.

Another way to think of it is, that by benefiting from public goods (roads, law enforcement, health regulations) already in existence you and your family have already entered into a social contract with the government, which acts as a representative of the collective will of all people towards a more perfect union, and in which payment is due for the benefits you have obtained.

See: https://en.wikipedia.org/wiki/Tragedy_of_the_commons https://en.wikipedia.org/wiki/Self-serving_bias https://en.wikipedia.org/wiki/Social_trap https://en.wikipedia.org/wiki/Bounded_rationality https://en.wikipedia.org/wiki/Prisoner%27s_dilemma https://en.wikipedia.org/wiki/Social_contract