The Senate Launch System (SLS) is so over budget and behind the times that this monster should have been cancelled the moment a Falcon 9 was reused. I remember reading about the launch tower that costs $1B to rebuild, a money savings effort. Then, they need a SECOND launch tower because the one they just spent a billion on won't be usable except for ONE FLIGHT. Unbelievable. Now, they're going to throw away a full booster in this test. Don't forget the elaborate test stand that probably cost $500 million for a one off test. For just this money, the Falcon Heavy was developed, tested and flown throwing Elon't groovy car into Mars orbit. That's the way to test things.
The problem with NASA is it has become a jobs agency for fat cat in Washington and not an exploration program. NASA should stick to unmanned satellites and leave launchers to those who can actually do it.