Nigeria a case study of father of six

A father has six children, trained each of them, gave them education, empowered them with different trades that each of them could (independently) make a comfortable living. Everyone was doing fine at the beginning. But in a short while, one of these siblings engaged in a strange business and started making huge money, so much that he could take care of the whole family! Then, all his siblings forgot their respective trades, living solely on their brother's income. But unfortunately now, the income began to depreciate, very little is available to share, and everyone is crying foul, blaming external forces for their woes! And I ask, can't each of you go back to your trades?