"The Taurus XL rocket's first three stages functioned as planned, but the nose cone (also known as the payload fairing) failed to separate 2 minutes 58 seconds after the launch. The nose cone covers and protects the satellite during launch and ascent, and is designed to separate and fall away shortly after the launch. Due to the failure of the nose cone to separate, the rocket remained too heavy to reach the correct orbit."
Your use of "blows $500M" seems to imply that they simply wasted the money, not that there had been a mechanical failure that had caused it. In essence, you are saying that NASA is wasteful unless everything they do is done perfectly. What they do is expensive, so if there is a failure, there is going to be a big ticket attached to it.
So, what, exactly, is your point?