There are pretty substantial ghouls that preceded Reaganomics: chartered monopolies, anonymous transferable shares of companies (thinking Dutch East India Company here), prohibition of local currencies, central banking, labor theory of property

And that succeeded Reaganomics: Chokepoint capitalism, evergreen IP, the gig economy

Yes, in a proximate sense, specifically in the US, Reagan broke a lot of dams that were holding back the most calamitous floods that were poised to drown us... but he didn't fill them with water in the first place.