Credit...Illustration by Joan Wong, Photographs by Meridith Kohut for The New York Times, Carly Zavala for The New York TimesSpaceX Gets Billions From the Government. It Gives Little to Nothing Back in Taxes.Elon Musk’s rocket company relies on federal contracts, but years of losses have most likely let it avoid paying federal income taxes, according to internal company documents.Credit...Illustration by Joan Wong, Photographs by Meridith Kohut for The New York Times, Carly Zavala for The New Yo...