Is the work of a municipal inspector, involving the monitoring and fining of unlicensed construction, permissible, knowing that citizens must be fined in courts?

There is no harm in paying a fine for violating building regulations unless it involves clear injustice, because regulating and monitoring construction is a matter of public interest. The ruler has the right to fine the violator as a deterrent to him and to others. This is considered a form of discretionary financial punishment, which has been permitted by some scholars. The one who carries out these matters is merely implementing the ruler's command and striving for public interests.