How we cite our quotes: (Part.Chapter.Paragraph)
Quote #7
For the San Tomé mine was to become an institution, a rallying point for everything in the province that needed order and stability to live. Security seemed to flow upon this land from the mountain-gorge. The authorities of Sulaco had learned that the San Tomé mine could make it worth their while to leave things and people alone. (I.8.30)
As Charles had hoped/predicted, wealth is (at least temporarily) able to buy peace—in this case, not by making "the people" prosperous, but rather by incentivizing people to leave others alone.
Quote #8
Charles Gould was not present at the anxious and patriotic send-off. It was not his part to see the soldiers embark. It was neither his part, nor his inclination, nor his policy. His part, his inclination, and his policy were united in one endeavour to keep unchecked the flow of treasure he had started single-handed from the re-opened scar in the flank of the mountain. As the mine developed he had trained for himself some native help. There were foremen, artificers and clerks, with Don Pepe for the gobernador of the mining population. For the rest his shoulders alone sustained the whole weight of the "Imperium in Imperio," the great Gould Concession whose mere shadow had been enough to crush the life out of his father. (II.2.9)
This is kind of an odd moment, because it seems like Gould now wants to have it both ways—is he involved in politics/national affairs or not? Here, it sounds like pursuit of the treasure is now an end in and of itself.
Quote #9
"Charles Gould," said the engineer-in-chief, "has said no more about his motive than usual. You know, he doesn't talk. But we all here know his motive, and he has only one—the safety of the San Tomé mine with the preservation of the Gould Concession in the spirit of his compact with Holroyd. Holroyd is another uncommon man. They understand each other's imaginative side. One is thirty, the other nearly sixty, and they have been made for each other. To be a millionaire, and such a millionaire as Holroyd, is like being eternally young. The audacity of youth reckons upon what it fancies an unlimited time at its disposal; but a millionaire has unlimited means in his hand—which is better. One's time on earth is an uncertain quantity, but about the long reach of millions there is no doubt." (III.1.35)
The chief engineer thinks that immense wealth is basically as good as immortality—at least if you are as wealthy as the American steel and silver tycoon Holroyd. Given a choice between the Fountain of Youth and the Fountain of Wealth, this engineer would totally jump into the money pool.