Fine. Since I too repeated that answer, let me expand on it:"The best way to approach it is to not approach it," is kind of a discussion-ending, non-starter of a comment, though. It is kind of like walking into a discussion about making peanut-butter sandwiches, and stolidly proclaiming, "I am allergic to peanut butter!" I mean, sure. Fine. That's great. But you're kinda done once you've said that.
The issue that needs to be met head on is one of meta. No amount of detail tweaking is gonna cut it.
The game is meant for isolated instances of heroic prowess. Viewed in that light, the spells are fine.
If you instead consider what a real character would do, given the ability to cast a level X spell Y times a day, please don't do so for individual spells in isolation without considering the rest of what the PHB and DMG gives characters. That is an exercise in futility.
By that I don't mean to shut down discussion. I quite literally mean it is futile, as I am convinced no good solution can come out of it. Just a statement, not a proscription. Again, unless you include the wider concerns of the world economy in that discussion.
In the end, the only fix likely to keep the game at it's current level of simplicity will be to remove the offending spell (along with a select number of other game features). Everything else very quickly approaches the complexity level of reality, that is way way too complex for a game of 5E's caliber (at least IMHO).
Or, even simpler, to leave everything as is, and just not abuse them as a kind of gentleman's agreement.
I hope you see that my intent here isn't another "discussion-ending, non-starter" post, but instead to make the point that this is a problem on the meta level which can only realistically be solved on the meta level.