There may be a serious discussion to be had about government spending. But it seems that you believe Musk and the rest of the GOP are interested in it. If they were, the House GOP wouldn’t have released a budget that asks for 4 trillion debt limit increase while proposing 4.5 trillion tax cuts. Or SpaceX wouldn't be awarded another $40m contract. While it’s a drop in the bucket, serious people would at least raise questions about the massive conflict of interest.
Musk and his ilk are interested in looting the treasury. It has nothing to do with government efficiency.