Why? Nothing in our Constitution requires precise laws. Arguably (and since I'm making it, I'll say I'm in favor of this argument), the Constitution would preclude overly strict laws because the Executive is a co-equal branch of government.
> Vague laws are not an excuse for executive agencies to go ham, and I applaud the judiciary for reining in executive abuse of power.
Why not?
Congress has the authority to pass the laws it sees fit. Why is it suddenly a problem that Congress passed a law that says "the agency known as the Federal Trade Commission is established and the President, through a set of commissioners appointed by the President and confirmed by the Senate, shall ensure that the these list of goals are accomplished and shall establish such rules as the Commission deems appropriate."
We aren't a parliamentary system. The Congress has the power of the purse and the power to enact laws. The President has the power to implement the laws and to spend the money.
What's changed in recent years is the judiciary has come along and decided that a hundred years of Congress writing laws with bullet-point goals and the President acting under those laws is no longer relevant because "Congress didn't write enough words." That's not how textualism works.