Universal injunctions are superfluous. If the law says the government cannot do X, then who is a judge to command that the government not do X? That’s the legislature’s job. Judges have no authority to create rules saying people shall and shall not do certain things. That’s called passing a law. Similarly, when a party violates an injunction, who is the Judge to enforce his command? If it within a case or controversy between litigants, then that is one thing. When the judge they’re going to proactively punish someone any time the law as against anyone… that’s a purely executive function.

In terms of efficiency, it’s more efficient. Those in favor of universal injunctions are saying there should be hundreds of judges all racing to rule over the government, and to have their opinions control in the abstract as to cases that aren’t even before them.

If the government forces the same issue over and over there are plenty of remedies at hand: 1983 civil penalties against officers, sanctions against attorneys for frivolous arguments, and ultimately the court can hand the legislature everything it needs to impeach and remove a president by ruling that he / she is intentionally failing to enforce the law.