Fish are picky. One of the deficiencies of a survival fishing kit is that it can't possibly hold a set of lures which will attract every fish out there. If you know what kind of fish are going to be where you're going to be, you can select lures and bait which will be most effective. Some types of lures won't be effective depending on the circumstance...obviously a spoon or spinner which needs to be reeled in rapidly to be effective isn't good for a pocket kit.
My favorite set up for survival(and I've never had the chance to test this in a survival situation and rather is just my opinion and preference based on some fishing experience) is using a pickerel rig. The rig (if you're not familiar with one) has two hooks on it so you can use different types of bait and maximize your chances of catching something. by putting a heavy weight on the end (either a fishing weight or something improvised) you can sink the line to the bottom, pull it fairly taught and just wait for something to take the bait. If the weight is heavy enough this is a very effective way of countering the current in a large stream or river.
I did a quick google search and the following site has some good information about fishing with such a set up.
http://manitoulinislandfishing.com/You can also use the weight to make a sliding sinker rig if that's more appropriate to the waters you are fishing or the fish in them.
If the waters are super deep this might not work as reeling in so much line by hand can be messy and awkward without a rod and reel...or you might be in a locale where the fish aren't on the bottom. A float is makes a good addition to a fishing kit for this reason.
With just bare hooks you need bait. It's not practical to keep live worms in a survival kit...for obvious reasons. But there are many types of synthetic bait that are relatively effective. I keep 3 different colours of rubbery jig bodies in my kit for that reason. After all it's not always possible to find worms or maggots. If fishing is the plan, buy some bait. Maggots are pretty hardy little buggers if you keep them right.
In my emergency kit I carry the obligatory stuff (hooks, split weights, etc) because it's light and nice to have as a backup but I doubt I'll ever need it over the real fishing gear in the kit.
If you have several pickerel rigs you can make a multi hook night line to try and catch many fish over night using the same technique only with more hooks. In a survival situation you want the best chance you can give yourself.
And don't forget to keep something to anchor your line with. You might have to wait a while and you won't want to hold the line...even if you do it's good insurance against losing a strong willed fish that's going to run.
I would say that a good multitool is the only other thing you need. The pliers are nice to retrieve your hook if a fish swallows it. Especially if you're in a survival situation you don't want to have to cut anything if you don't have to. The scissors on my Gerber Diesel are perfect for cutting fishing line.
I also carry 2 Speedhooks which I purchased from BestGlide. They're like a mousetrap for fish and will give you the best chance of hooking even the most picky fish.