It Was His Concept
To choose who would inherit his fortune, John had indeed devised a complex sociological experiment. As absurd as it may seem, John felt certain that it was the best option. Half of his fortune would still go to charity, but the other half would depend on the results of the experiment.
After all the details had been ironed out and approved, the experiment could begin. He had recruited employees whose only job was to keep the experiment running well while he was away.