Wait, what? While the Singapore MRT (subway, metro) system is top-tier (along with Seoul and Hong Kong) it is not a deregulated free market wet dream.

The public Land Transport Authority built and still owns most of the assets, and enacts strong regulation for the duopoly of service providers (SBS and SMRT) - not only on service levels, but also on operational processes. Even so, there's awkward UX quirks on the boundaries between lines run by the different companies.

If anything, the Singapore MRT runs closer in spirit to a US taxicab system - that is, surprisingly regulated on a global scale.