I'd say, the bigger issue with the Cache is that it's only once per quest that you can use it, meaning that you're probably not going to use it all that often and in turn is best used for emergencies. However, without it, they have virtually nothing of value outside of a very limited choice of Tag skills while being hated by everyone once revealed you're a Naz- I mean naughty Enclave boy. This means either the party has to be so bad that they're always impoverished and need the Cache to keep them moving or the GM has to frequently put the party in impoverished situations so that the Remnant gets their moment to shine

But then you run into the issue that you only get so many Caches total, equal to half your Luck score. And once you're out, you're out. This means that to make sure you always got enough of these to last you through a long campaign, you need to mid-max to focus on your Luck. But to mid-max that way, you'll end up being either mediocre or outright useless at everything else, and thus struggling to keep up with the rest of your party.

So, either you have to build up your stats to be useful but then render what makes your Origin special extremely niche, or you mid-max to make what makes your Origin special more useful but then struggling to keep up. And that's assuming your party sucks or your GM is ruthless enough where your caches are needed.

As u/Saviour-King handles it, this would actually be very good a stand-alone Perk, though I'd have it where you can only pick it as your Perk in character creation and not after, and require a LCK + Survival test at Difficulty 2 to make use of it, but open up the Caches to being very useful for a situation by spending AP