Consider this hypothetical: a federal judge rules against the Trump administration's firing of the inspectors general and must offer the fired employees their positions back. The Attorney General says the judge overstepped his constitutional power and calls the ruling invalid. What should the person who would've rehired the employees do?

Continue that hypothetical further: the case makes its way to the Supreme Court, who agrees with the federal judge. The executive branch continues to ignore the order. The Attorney General is held in contempt of court and fined a large amount of money. Who's going to collect it? Any executive branch employee trying to carry out that fine would be violating this executive order, and be dismissed. So the fine would never happen.

Considering the president and vice president's recent disdain for judicial rulings against them, this may happen.