My guess is that this wealthy brother did not do any research when he donated such a large sum to an individual with the expectation that it would be distributed effectively. This presiding overseer- what were his qualifications for managing this money? Did his past experience give any indication that he would plan out and distribute it effectively? Or did he just give it to him and expect that "Jehovah will direct things"?
This is a constant problem for the WTS, which affects the rank and file. Men are put into positions of authority, with the power to make certain decisions and manage property or funds or even legal matters, without any oversight to make sure that they know what they are doing. It's particularly bad when dealing with issues of sexual abuse, where men with zero training are suddenly playing the role of psychologist or psychiatrist combined with their roles as judge/jury/executioner.
Is it any surprise that they not only screw things up, but refuse to take any responsibility for the mess they create and even try to persecute anyone who points out their failures?