Girls usually are well known for shopping and most of them basically use it as a stress relief mechanism. Allowance is usually rushed to thing like nails, massage, makeup, Hair, wax, handbags, clothes, toiletries and so on and so forth.
Some women choose to save that hair money by doing their own hair at home, then spend it on something else that matters the most to them. Not actually every woman is in to hair. Some are in to bags, some gadgets, some makeup and many more. Therefore, a woman who is into something else will prefer to spend the hair money elsewhere and even rather cut her hair very short.
Should we say allowance money is cleaner than the gold digger's money? Definitely not. Money is just paper but how you choose to see it is what matters the most.