Hello Russianruk,
I've taken a look at your country and I noticed a few things. Here are a few pointers:
1. Up your social security to at least 70%
2. get rid of all of your national industries and get good profitable ones for them instead. CEO corps are the best if you can get them but at least get rid of the national industries. They are the worst you can have so keep their numbers low.
3. get rid of all of your defensive army units. You are under protection and don't need them so don't waste money on them
4. Lower the quality of goods orderd for your country to 120 (if you have already done this sorry for the comment)
5. Make sure every corp has 100% hiring. You'll make more money with 10% unemployment and 121% functioning corps then with 1% unemployment and 101% functioning corps.
6. Lower your taxes and raise your profit share. Something in the area of 20-60.
What will these things do?
In the short run it will cost you billions. Hundreds of billions. In the long run the better corps will generate more cash. Because of the higher social security setting your efficiency will rise and you will get more welfare (and more cash)
With your population you should be making an easy 25B per month. I hope that with this advice you'll get there
Good luck and happy gaming!