This is actually basic economics and it is also very practical because l noticed that when someone in Nigeria have just #1000 in school as a student, he will be able to use that #1000 to survive for about 5 days if he knows that money money will not come from any other place till the end of that five days.
On the other hand, that same person can use that #1000 to eat a meal if he knows that he have his sources intact.
Whenever people are ready to spend alot because they have the money, marketers will also increase the price and the price will continue to go up in that manner. The spending is always going to be affecting the price of commodities.