Waaaay oversimplification, I think claims like that (not necessarily from you) are a symptom of folks not realizing just how good we have it to include our government.
Believe me, I'm well-traveled enough to understand how good we do have it here. But being the best doesn't mean you stop seeing where improvements could be made. I think the allowance of free speech and criticism of our government leads to constructive feedback, despite all the ad hominem, alarmism, and fear mongering chaff that gets put out. So while it is an oversimplification to state that we are trending toward authoritarianism, it's one side effect that may arise from creating too many laws to administer, and too many agencies to oversee. We end up with fiefdoms who effectively (if not statutorily) answer to nobody. I'm not advocating massive deregulation, but there has to be a limit on what each layer of government (e.g. local, state, federal) is doing. Prioritize what can be done to a full level, rather than trying to fund & execute more than is possible to do in a competent manner. Yes, I understand it's hard to get there. But if we keep writing new laws without looking for old ones we can retire, we're going to continue trending toward more bureaucracy, less efficiency, and greater risk of effectively unilateral agencies and even whole branches of government.
CONGRESS passed that law. I am OK with that. That is the people's representatives representing them, apparently well since it was widely praised. I am not against regulations under executive branch authority for the very reasons you state. I am against the imperial nature of many of the agencies, encouraged by the presidency. You don't have to look far. Start with the EPA's moves. They have been stymied by the Federal courts. The court said it was beyond the power of a regulatory agency. That has happened before. Most times the case never goes far or gets the press because there isn't money for the little guy to appeal all the way. The EPA over reaching got ample funding from the energy companies to fight it.
...
You (responding to Flash) obviously disagree with me on this. That is quite alight. It is hardly a crisis yet. I am just wondering what it would take before you got uncomfortable with a regulatory agency's power and reach (hypothetically, of course). I am sure there is a limit for you. At some point it would cease to be a representative democracy. Executive branch agencies could ignore congress and the judiciary. Neither congress nor the federal courts have police forces to enforce their will.
I couldn't have said it better myself. Not a crisis, but something to guard against. How many politicians are calling for trimming the fat from the law books, the tax code, etc.? The ones who do hardly ever get anywhere because it's a tough sell to the voters and could be seen as undermining their own power.