I think you're inventing scenarios here that are too unlikely even for a pretty corrupt country. There probably exist laws in a number of countries which would technically jail you for taking some not-explicitly-illegal job. But this is absurd. Unless you're an actual lawyer giving opinion here?
I think if you trust people to not be corrupt you will wind up with corruption. A bad law is one that requires the empowered to not abuse it. A good law can't be abused. Harsh and cynical but true - reducto ad absurdum giving someone the legal power to murder anyone and relying on it to "not be abused" is a law literally bad enough to be causus beli for a civil war.
