Why is prostitution illegal?
Because when it comes to screwing people and taking their money, the government doesn't want anyone outperforming them.
Government's Monopoly on Exploitation
Categories
Explanation
Experiment
The joke plays on the idea that the government is greedy and exploitative. It uses the double meaning of 'screwing people' - both in the literal sense of prostitution and in the metaphorical sense of taking advantage of people - to humorously suggest that the government makes prostitution illegal to protect their own exploitative practices.