Muggle society could hire wizards to punish thieves.
Wizards would know more muggles personally.
Maybe there really were fortunes made in those days, and it was covered up on our end. (Small fortunes, because muggles hadn’t had time to mine as much gold?)
The statute of secrecy also didn’t exist back then.
What are the relevant implications of that? I’m not coming up with any.
Muggle society could hire wizards to punish thieves.
Wizards would know more muggles personally.
Maybe there really were fortunes made in those days, and it was covered up on our end. (Small fortunes, because muggles hadn’t had time to mine as much gold?)