Frankly, yes, spending your money helps keep the economy going. Without the flow of money between people and companies there would be no modern economy. And I for one like living in the 21st century. So yes, spending money helps the person receiving the money and employs people.
That being said, how much is enough? Is anyone who will be shopping at the sales Friday really lacking anything they need? Maybe, I am sure there are examples, but what about the people in the Philippines? While they are devastated, their damage actually still pales in comparison the the Indonesian tsunami of nearly a decade ago. Personally, I struggle to enjoy stuff, but I rarely regret the experiences, even the expensive ones. Do you really want to change someone's life? Send her to Africa, to a village without clean or running water. A new handbag does not really compare.