If every leader is given very strict laws in his country, then theft, robbery, bad deeds etc. will be less or will not happen in his country.
If the leadership of every country is good, its country will be very prosperous, if its leadership is bad, then the people of that country will also be bad. Every leadership should be given fairly and no false shelter should be given so that everyone in their country can receive a fair trial. If the leadership in his country is good, the people will behave in order, the word of their leadership will spread all over the world and criticism of them that they are running the country very well will be reflected in their actions.
Enacting strict laws by a leader can indeed reduce crime in his country. However, its effectiveness depends on a number of factors, including law enforcement policies, fairness in the legal system, and other social and economic factors. Although providing strict punishments can be one way to reduce crime, attention is also needed to prevent crime, improve socio-economic conditions, and increase legal awareness in society.