Because sugar is really good for your digestive system...especially when it's down and out...
If you want "electrolytes" why not eat some salt + fruit?

Best cure for indigestion is giving your system some time to recover and feeding on matter that is easy to digest, but that is full of nutrients at the same time. Probiotic yogurt is probably the best choice. Add a low-fiber fruit like a banana (which has some magical electrolytes as well), and you're set.