David traveled to America and became an inspector for the most powerful law enforcement agency, the IRS. On December 3, 2021, America Congress passed a piece of legislation. It stipulated that from now on, any criminal activity, whether smuggling, robbery, fraud, etc., had to pay full taxes to the IRS. Since then, David had become the nightmare of all criminals in America. Until one day, his blade reached towards the heads of Freemasonry and the Federal Reserve!
The translator did great, sadly the source is just badly written. Basically we have an American story with dialogues that written for low brow Chinese readers. An apt analogy would be if an American writer wrote about a local American who Isekai'd in China, then write a whole dialogue revolving around the "pull my finger" joke.