Laissez-faire capitalism does not mean anarchy.

Under capitalism, the government’s job is to protect rights as a referee (which means the banning of the initiation of physical force from all relationships, and the enforcement of voluntarily made contracts), not to regulate people’s affairs as a dictator by violating their rights.

For example, if a company sells a product as being of a given level for safety, and it is not; then the purchaser has a right to demand legal compensation. Otherwise, the government’s position is laissez-faire: to leave market participants alone to conduct their affairs peacefully and honestly.