Comment by danielrhodes

There are obviously stupid loopholes in tax law that serve no wider benefit, but that's not the case here. This was very intentional and not crazy at all.

The whole reason this tax credit exists is to promote more R&D. If you are doing heavy R&D you can pay less income taxes. It's an incentive for companies to not hoard cash but to put it into creating new business and opportunities and stay competitive. They still have to pay payroll tax, which is a substantial portion of the tax companies pay to the federal government anyways. But even that too is an incentive for companies to run more efficiently: the fewer people you have on payroll and the more R&D you do, the more your company is an innovation machine - that ends up being good for the economy.

There are obviously lots of cases where American companies use loop holes to not pay taxes (especially on international income). That's a separate debate. But if you see a big company (like Amazon) not paying income taxes, it could mean they heavily invest in R&D. That's why when I hear politicians whining about this, I know they are not always doing so in good faith.