There are many answers. "Because we can" is the obvious private one. "Because we need to pay for R&D" is the one that is likely trotted out. If I'm a US lawmak

There are many answers. "Because we can" is the obvious private one. "Because we need to pay for R&D" is the one that is likely trotted out. If I'm a US lawmaker who cares about their constituents, I'd probably like to know how to have the USA benefit from someone else paying for the R&D.