It is narrated from Imam Ali (AS) who said: Four factors lead to downfall of governments and they are:

1.Spoil the main tasks

2.Engage in minor tasks

3.Prefer and support ignoble individuals

4.Blocking and putting out of work noble individuals [1]

1] Mizanul Hekmah, Vol. 3, Page 359.

Source: en.shafaqna.com