NPR is not Stars and Stripes, Voice of America or even the BBC. Assuming 4% in direct government funding (from all levels) as estimated elsewhere in the thread, plus some amount in government subsidization of donations to a registered non-profit; the fiscal contributions from government is meaningful, but not sufficient to assume it biases coverage.

Stars and Stripes has a mix of funding, including about half its budget from the department of defense, but has editorial independence; although I imagine it's hard not to be influenced.

Even Voice of America has safeguards for editorial independence, although its budget is fully state funded.