It's imperialism to be precise, the highest stage of capitalism which see the merging of monopolies and state power, resulting in things like widespread corruption (lobbying), state waging wars in the interest of big capital, policies being subordinate to the stonks line and of course bailing out corpos which are "too big to fail".

In a nutshell, it's just natural development of capitalism.

I guess you could say it's "corporate welfare" but the word "socialism" is not correct and shouldn't be used here.