It's in my self-interest to rob you if I can get away with it.
It's also in my self-interest to strong-arm my way to a monopoly and charge more than the efficient price.
It's also in my self-interest to prevent workers from obtaining bargaining power.
It's also in my self-interest to start a weapons manufacturing company and make campaign contributions that will increase the probability of wars taking place.
Seriously, it's not like anyone here needs to be convinced about the power of capitalism. But not even Adam Smith was so naive as to think there was nothing wrong with self-interest, or that it always worked out in favor of the public good.
The best goals tend to align themselves with both self and public interest, as when the going gets hard and one or the other fades from view the other spurs you on.
I thought it was going to be about the nonsense rumor from a while back that Google could save the country $HUGE_AMOUNT of electricity by changing their background to black.