Luxury as an Unsolvable Equation

I was mulling over the idea of luxury the other day, and it struck me how much it feels like a complex math problem. If we treat it as an equation, what do you think the variables are that make it so difficult to solve for most people? I’m curious about your perspectives maybe it’s something like time, access, or even personal values acting as constraints. How would you break down the components, and what makes the solution seem just out of reach for so many?