Why did Alan help James Stewart to get the money from his tenants?

cant u tell me if i would not mention the chapter name

Alan helped James Stuart to collect the rents in order to make sure the chief (Ardshiel) and his family were cared for..... in order to make sure the next generation was prepared to fulfill their destiny.

“Ay, but Ardshiel is the captain of the clan,” said he, which scarcely cleared my mind. “Ye see, David, he that was all his life so great a man, and come of the blood and bearing the name of kings, is now brought down to live in a French town like a poor and private person. He that had four hundred swords at his whistle, I have seen, with these eyes of mine, buying butter in the market-place, and taking it home in a kale-leaf. This is not only a pain but a disgrace to us of his family and clan. There are the bairns forby, the children and the hope of Appin, that must be learned their letters and how to hold a sword, in that far country. Now, the tenants of Appin have to pay a rent to King George; but their hearts are staunch, they are true to their chief; and what with love and a bit of pressure, and maybe a threat or two, the poor folk scrape up a second rent for Ardshiel. Well, David, I’m the hand that carries it.” And he struck the belt about his body, so that the guineas rang.

your answer is best if u dont mind can u tell me that answer in 2 or 4 lines ..this one is long by the its the best answer.