It's called the "prosperity gospel".
It was invented by televangelists who told their audiences "give me all your money and God will reward you by making you rich." If you're old enough to remember Oral Roberts, he was one of the first.
Then it spread to mainstream churches, because rich conservative "Christians" wanted to believe they were rich because they were good people, and that poor people were poor because they were bad people. And those rich "Christians" donated generously to churches that told them what they wanted to hear.
It's Christianity, yes. And it's the most repugnant Christian heresy I've ever heard of.
Does it believe Christ is the son of God? Yes? Then it's Christianity. A particularly ugly version, yes, but Christianity has come up with some really awful versions of itself over the millennia.