Dagny is a model of the spirit and practice of capitalism. She believes in industrial production and profit — hard work and earning large amounts of money. She orders rails from Hank Rearden instead of Orren Boyle because Rearden delivers his product and Boyle does not. Likewise, Dagny will provide freight service to Ellis Wyatt and the Colorado industrialists but not to the destitute economy of socialist Mexico because Wyatt and his colleagues produce but the Mexican economy does not. Jim, on the other hand, is an example of the spirit and practice of socialism. He believes in sacrificing for the "public good" and in giving chances to the little guy, rather than dealing with those already successful. He orders rail from Associated Steel instead of the efficient Rearden Steel in order, he says, to give Orren Boyle a chance. Likewise, Jim builds the San Sebastian Line at a cost of millions to give the impoverished Mexicans an economic opportunity. Dagny seeks to earn profit; Jim seeks to serve the public welfare. Because of their underlying differences, Dagny and Jim clash regarding the San Sebastian Line, the choice of steel companies, and many other things.
Based on this, I have to agree with EBH that Publius' threads - especially with Billthedrill's comments - are much better.
Well, plus she thinks there's a good chance if she makes a success of it, the Mexican government will steal it from her and nationalize it.
OK, I got to this and realized the writer's an idiot. The sentence is literally true, but very misleading. Jim wants to make profit too, he just thinks he can do stupid collectivist things and still get there, whereas Dagny's world is the one that truly extends people an opportunity.