The very idea of saving money is beautiful. But I could never set aside a certain amount of money for later. I can live on a limited amount of money just fine. But as soon as I manage to earn more, my expenses immediately increase, I stop counting my expenses and they increase exponentially. Although when difficulties with finances arise, I can easily save and reduce my material needs (this was often the case when I was a junior student).
it seems when you see your income has increased, you feel confortable in spending more money, so you have difficults saving funds when you have the option to do so. I believe you can control your desire for purchases in order to revert this reality. When you feel that urge for buying something, wait for a while, think again about what you are doing, ask yourself if you really need that product or service you are going to acquire or if it would be more worthful for you to save that money instead of spending it. Draw long term goals for your money and make it important for you, then the impulse for daily purchases will fade out within time.