While Christians generally believe in the Trinity, the singularity of the Father, Son and Holy Spirit as God, socialist Christians add one more: The Government. Thus is born the Quadnity: Father, Son, Holy Spirit and Government.
Government becomes a god-like entity that creates the moral obligation to defer to the government to take care of our fellow man, woman, child, pervert, and slackard. Oh, not merely the moral obligation, but the coerced obligation, similar to the coercive doctrine and practices of Islamic Sharia.
Instead of the Gospel being a personal relationship with God, Quadnitarians turn that over to the 4th person of the Quadnity.
We no longer have a personal obligation to help our fellow man as God urges us to voluntarily do. Quadnitarians prefer the coercive, enslaving power of government to mandate that we turn over to the government all the 4th person of the Godhead requires of us to sustain others in the lifestyle for which they successfully lobbied.
And that is the Social Gospel in a nutshell.
The irony in all this is that the liberal Christians that promote this Social Gospel for the most part don’t even believe in the traditional Biblical doctrines of God the Father, God the Son, and God the Holy Spirit. So all that is left in their view is “God, the Government.”