I have suffered a martyrdom from their incompetency and caprice.

我的无能和反复无常而殉道。

His incompetency is reflected in his poor choice of appearance.

的无能反映在糟糕的外表选择上。

He listened to her moans about lost customers and bad debts, the swindling ways of Mr. Johnson and the incompetency of Hugh.

总是神贯注地听发牢骚，说怎样失去了顾客，怎样放了呆帐，约翰逊先生如何欺骗，休多么无能，等等。

So to answer your question directly, you ask what the cause is, it's incompetency and perverse incentives.

所直接回答你的问题, 你问原是什么, 这是不称职和不正当的激励。