Why can't social security be managed vertically?

1, mainly due to the late start, the overall planning level of various types of insurance is not high, the endowment insurance is planned at the provincial level, and other types of insurance are basically planned at the municipal level. Take medical insurance as an example, it is impossible to completely unify policies among provinces and cities, let alone the whole country.

2. The secondary reason is that local conditions are different and each has its own particularity. Take a famous tourist city as an example, where the old-age insurance can only be transferred in, it is difficult to transfer out.