“I’ll pay you back when I’m grown up,” the homeless girl pleaded with the millionaire, asking for a small box of milk for her baby brother who was crying from hunger — his response stunned everyone around. The afternoon sun beat down on the crowded street of downtown Chicago. People hurried past, their eyes glued to their phones, too busy to notice the small girl sitting on the corner of the grocery store steps. Her clothes were worn, her hair tangled, and in her thin arms, she held a baby wrapp