Most of you totally missed this guy's point. He's asking what you would do with all the extra resources. He's not asking for advice on how to play so that he wins more quickly, or doesn't amass such a huge surplus. So quit flaming him already, gosh.
One thing that you missed out on, is Sins has UNLIMITED resources. Harada is making it to the end of the game, buying everything out, and filling up every world 100%. There is NOTHING Harada can do after that, because in 10 more minutes he'll have to find something ELSE to spend it on. It's an endless loop, and in 2 days he'll be back to ask how he's going to spend the NEXT million resources he picked up!
The BEST solution is to spend resources as fast as you can get them. If you can't spend them fast enough, then try more aggressive, fast, and stupid strategies, and learn some new techniques along the way. Don't just sit around for 2 hours sending one giant fleetball to tag each world one at a time. That's how you get a huge excess of resources in the first place!
Also, play smaller maps. Large maps take a LONG time to win without an ally or two to double your efforts.