I see self control has something we need to make sure we can withstand so avoid taking decisions that can hurt tomorrow. If you have money and you cannot save it, you will finally finish the money unless you invest it in a way that that will bring profits. People need to learn how to invest their money and not gamble with it or spend it on things that are not going to bring profits.
If you don't stick to the habit of keeping your money so you can invest it later, you might end up losing everything without noticing how you have spent all the money. The habit of saving can become very profitable in the future.
It's generally very difficult for a person to have money and still not spend it, especially when they want to buy something, etc. For this reason, there should actually be ways for people to save money in which they won't actually have direct access to their money for a certain amount of time so that they don't get intimidated and spend it. Something like a committee where a bunch of people put money together, and then they draw a name each month, the one whose name comes out in the draw keeps the funds for that particular month, those wishing to save can request that their names aren't added in the draws for the initial months.
One could also keep their money with someone that they trust completely, like their mother, because I believe there is no person on the face of the earth that a person can blindly believe other than their mother because she loves you unconditionally, and she would always take care of your money and give it back to you as it is whenever you ask for it.