And Scooby-Doo villains are not run-of-the-mill criminals: They all have the uncanny ability to manufacture realistic monster costumes, project full-scale holograms and carve out high-tech hideouts in abandoned mineshafts. Many of them already had impressive vocational skills prior to their criminal lives -- three of the villains were PhDs, two were lawyers, one had the ability to produce near-identical forged paintings, one could repair boats, one was a magician, one was a stuntman and one could hypnotize people.
See that? That's the educational system, art world, maritime engineering and entertainment industries -- all in the toilet. Each of these villains showed creativity, intelligence, diligence and ambition. In our world, they would easily be employed, maybe even famous. But, in the universe of Scooby-Doo, it simply wasn't enough. The Scooby gang ran into a new, desperate genius every single week for decades. Either brilliance is simply run-of-the-mill in their universe, or else the entire economy has collapsed, and what we're witnessing is the death throes of society itself. Although there are signs that the sandwich ingredient and dog marijuana industries are booming, so it's probably the former.
With all the ghost pirates and ghost ships around, shipping must be in a bit of a slump.