What suggestion would you give to the those citizens who don't perform their duty properly?

Constructive Criticism - help them be better and learn properly.

Explanation:

When a citizen is not performing their duty properly, you always want to let them know. However, you should go about it with their best interest in mind and wanting to better them. You should go about it with the intention of telling them how they can do better and what that would do for their benefit. You should suggest that they try their best all the while learning to do better in their job. Help them learn the correct ways and become better at it.

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