For example the tenant has to take days off work and use them for moving (or for court hearings) instead of productive work. The government has to pay the judge

For example the tenant has to take days off work and use them for moving (or for court hearings) instead of productive work. The government has to pay the judges, or the police for a forced eviction. Legal clinics use their scarce time. The tenant may become homeless (homelessness is often considered as an issue with strong negative externalities).