Why won't Exxon increase output?

The Question:

Texas-based Exxon is the largest publicly traded company in the energy business. In fact, it's the most profitable company in the history of capitalism, earning a record $40.6 billion on sales of $404 billion last year. Yet even with prices at the pump near all-time highs, Exxon isn't planning on producing any more oil four years from now than it did last year. That means the company's oil output won't even keep pace with its own projections of worldwide oil demand growth of 1.2% a year.

The Answer:

... the contracts big oil companies sign with countries such as Angola and Nigeria. In such contracts, foreign companies put up the capital to fund new projects, and they are paid back in barrels. If oil prices rise above certain levels, Exxon gets to keep fewer of those barrels as profit for itself.

In other words the extra revenue from higher prices goes to the governments, not the oil companies.