system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] If we, wizards, can literally generate/duplicate matter/objects/energy at will, what is the point of selling/buying anything that is not information/intellectual property?

The title says it all. Like, why do we even have an economic system? Most of our basic resources, like food, water,  clothing, space, shelter, and everyday objects, are infinite because we can generate/duplicate them. We can even generate some magic items for god's sake! And most if not all the labour can be done with magic, especially if we integrate muggle technologies. What is the point of money them? Should we not be truly a Communist society, as pretty much all members have access to the means of production (e.g. the wands)?  
I mean, besides the hair of Scarlet Johanson (for, hm.... polyjuice reasons...), what other material product would I had to seek in the market during my lifetime?
gpt
Can't duplicate magical goods, and Gamps Law has some applications to what you said. But the main thing is magical goods.

Not everyone can perform all the interesting item creations, broom makers charge a premium. Want a proper owl? Wizarding currency. Potions? Wizard currency. Specialty services? Same. 

The list goes on.