They're blowing up their own money, unless you still count it as being the taxpayer's after the government pays them for launch services.
R&D for starship has a several-billion-dollar NASA grant. Something like 30-50% of the money being blown up on this program is taxpayer money.
Starship program is funded in part by NASA as part of Artemis program. So some of this money is ours.
R&D for starship has a several-billion-dollar NASA grant. Something like 30-50% of the money being blown up on this program is taxpayer money.