If the problem was "Boeing have a big hole and need to fill it with money" you can indeed "fix" that by dumping US taxes into the hole until it's full. When US

If the problem was "Boeing have a big hole and need to fill it with money" you can indeed "fix" that by dumping US taxes into the hole until it's full. When US mortgages blew up, that's the exact fix. Money hole, fill with tax money, solved. But that's not the problem here. Boeing is no longer able to make high quality aeroplanes. And if you dump US taxes into that hole the hole just yawns wider. Which doesn't mean the US government won't try that, but it's expensive and won't work.