Why do people treat you nicer if you have money?

So long story short I was in horrible car acccident and I received "some money" through settlements. I don't get why do people treat you better if you have money. For example, someone in my class was a complete j**k to me before my settlements. All of the sudden when she found out this classmate would be nice and kissing my ass. I thought people would treat you the same. Why do people treat you differently if you have money?

Why do people treat you nicer if you have money?
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