Mohammed bin Salman is a hypocrite, imposing austerity on his country while spending lavishly himself. He has also behaved irresponsibly in prosecuting a wider war against insurgents in neighboring Yemen. It would be difficult for the Saudi government to remove him from power, as he is probably the second most powerful man in the country, and a member of the ruling family, but it would be the right thing to do.
Yes, Saudi prince Mohammed bin Salman should be removed from power after using country's money for his own benefit because it shows that he does not care about the people he is meant to protect. He is only looking out for himself, and that is not what someone in his position is meant to do.
At a time when public spending in Saudi Arabia has dropped by an unprecedented 71% thanks to the prince's own incredibly harsh program of austerity, it might seem unbelievable that he should spend so much money on his own personal pleasure. This behaviour suggests that he is a dangerous narcissistic and callous person who should not be allowed in a position of power.
Mohammed bin Salman be removed from power after using the country's money for his own personal benefit. A prince in Saudi Arabia, he should not be immune for the laws of society or basic ethical behavior. Otherwise, the entire country will face a backlash from its population and the entire kingdom could be in danger.