

This is a really great question! You’ve already got the underlying reason down too - all the various executive departments were created to distribute the enormous administrative burden of figuring out how to enforce laws that have been passed.
Interestingly, Congress is actually in charge of creating the various departments. The President is not authorized to abolish or create new ones, or to expand their jurisdiction or invent new powers, however they are responsible for proposing leaders to each and soliciting their guidance for topics within their domain. How this currently gets enforced is part of the issue however.
Independent agencies also exist that do not explicitly fall under the authority of the President. While the President can remove heads of departments for any reason, there is a much higher bar for removal of independent agency board members.
As the office of the attorney general is one of the government’s oldest, established during the first Congress, this may be a matter of combatting tradition more than anything else! This predates independent agencies by something like 100 years.
I should also edit in a clarification that the DOJ not being an independent agency is what allows it to be more partisan than something like the FTC. Also that an independent agency does not in and of itself entirely mitigate partisan politics from its decision making.




You seem to be mixing two topics. One appears to be a complaint about purchasing power between tourists and locals, and the other about US domestic purchasing power on minimum wage.
You’ve got lots of great answers by others on the latter and how it is unsustainable as a living wage. Why Americans (and likely other Western tourists in general) consider certain countries “cheaper” is because of exchange rates. That would be a whole post on it’s own.
A single US Dollar (USD) can be used to buy about 93 Indian Rupees (INR), as an example. The average monthly wage is something like 25,000 INR, so even minimum US federal wage would be 5x more monthly buying power (but as explained by others, minimum wage earners are not the ones traveling). “Cheap” is used to compare against a similar purchase in their home country and what it would have cost there. It is not an insult but a way to describe the difference in cost relative to income.