And just like that, he explains many of the plans to the Emperor, and the Emperor is satisfied with the plan, he finds this plan worth it.
Sharky since belonged to the modern world, he knew the public image is important, many politicians do this. And since it is not so expensive, there is not so much monetary loss.
Moreover he also knew, the Emperor in reality, never dared to execute him, because his adopted father Edward's will again started the bloodbath. People still remember, when he does the bloodbath, when his wife dies, and after his wife, his daughter and his adopted son were important.
Moreover, if Catherine really denies the marriage with the Crown Prince, then the Emperor's image will be damaged. So, the Emperor just wanted to test his capability, nothing more than this.