Hello Steve,
I think I have found your country on Fearless Blue - The Grand State of Morana.
Your country is indeed making 25B a month in a profit, and the indexes are looking healthy. However, you need to know that the profit and loss figure you are looking at does not consider how much money your corporations are making or losing. You are having problems because your corporations are anything but healthy, and this is where all of your funds are going.
Steve's Basic Action List:
1: You have too many corporations for your population size. Every corporation should be at 100% hiring, as otherwise they will make a loss and require cash transfers from your country. Close 15-20 corps, especially the ones that are not at full hiring. 20 corporations at 100% hiring will make much more profit than 40 at 5% hiring.
2: It seems most of your corporations are reserving their production for contracts. Looking at the corporations you have built I suspect you are trying to make your country 'self sufficient.' If this is what you are aiming for, don't. It isn't possible, so just sell the product on the open world market.
3. Your corporations are of the wrong type and wrong product. I'd advise returning your national corps to state again. Also, you should avoid making your economy base out of agricultural, mineral, food or military corporations - focus on high tech and industry.
With a couple of weeks work acting on the things i've listed you will have a more healthy country. I'm sure other players will have suggestions regarding the smaller aspects of what has gone wrong.
Don't give up, good luck! :-)