Actually, I think the economy is in shambles because most of the population is DTF with literally anybody they bump into, 24/7. You don't get a lot of real work done if you're constantly taking 'breaks', not to mention the potential for workplace accidents, people getting the crap beat out of them because someone 'can't feel it' unless someone is in pain, and the drainage...
Oh yes, the drainage. You know what you get when people are especially squirty when having sex and they're having it multiple times a day? Fluids all over the floor. That stuff has to go somewhere, or it's a slipping hazard. So everywhere has to factor in fluid drainage, with drains, pipes, flow valves, and vermin traps for -every- floor in the building. And it's gotta be maintained, or it's gonna back up. And the people maintaining it are likely just as horny as everyone else.
And then everything gets dialed up to 11 when an arcane storm breaks out.
This is why you sometimes see 'world orgy' crop up sometimes in porn as an apocalypse scenario. Because everything just comes to a screaming halt when nobody can keep it in their pants.