They can do to another. If they can tax “obscene” profits from a legally operating corporation and define what an “obscene” profit margin is, then they can decide your profits are “obscene” as well. If you think Big Oil is making too much money, then you need to look at the outlays required to operate in that market. If American oil companies control five percent of the world supply I would be surprised. If you think Big Oil is making too much money, get an education, look at some numbers, and learn a little about economics.
Taxing Big Oil profits would be bad
Many companies exceed big oil’s profit margins