Hoarding excessive wealth is a mental illness
From BurnZero
Whilst a corporate entities have the distinct characteristics of psychopathy a billionaire that often is the result of corporate activity has a distinct pattern of behaviour which can also be seen as a mental illness, kleptomania.
Kleptomania
Kleptomania is the recurrent inability to resist urges to steal items that patients generally don't really need and that usually have little value. Kleptomania is a rare but serious mental health disorder that can cause much emotional pain to themselves, loved ones and the planet if not treated.