Hoarding excessive wealth is a mental illness
From BurnZero
Whilst corporate entities have the distinct behavioural patterns of psychopathy, many billionaires suffer from an insatiable kleptomania (Figure 1).
Kleptomania
Kleptomania is the recurrent inability to resist urges to take items that they 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.