Most of people here do not rely 100% on investment income, I assume, thus such a situation would be impossible for them, since labor income tax does not allow to deduct this much. But I have successfully lowered my taxes at occasion where I incurred some substantial investment losses (the startup I owned stock in folded). It didn't make my tax to zero (and thank God, because this would mean I've lost as much as I make, I don't want this kind of losses) but it did reduce my taxes.

> Why cant we have a sceptical approach when the topic in question is large corps?

Sure we can, in fact we must. But skeptical approach means get the facts, verify them, then make decision. Not read the outline, feel outraged, reject any reasonable explanation because we must be skeptical about large corps. Having losses carried over from previous years is nothing wrong, and one part of being skeptical is being able to recognize there's no "there" there, and move on.