The word redemption is interesting. The Jehovah's Witness say this. Christ's death provides the opportunity for people to work for their salvation: perfect human life for eternity on an Eden type earth.
The Bible teaches this. Christ's death was the complete payment for humanity's sins.
24 and all are justified freely by his grace through the redemption that came by Christ Jesus.25 God presented Christ as a sacrifice of atonement, through the shedding of his blood—to
be received by faith. He did this to demonstrate his righteousness,
because in his forbearance he had left the sins committed beforehand
and through him to reconcile to himself all things, whether things on earth or things in heaven, by making peace through his blood, shed on the cross.
1 Peter 2:24
“He himself bore our sins” in his body on the cross, so that we might die to sins and live for righteousness; “by his wounds you have been healed.”
2 Corinthians 5:20
We are therefore Christ’s ambassadors, as though God were making his appeal through us. We implore you on Christ’s behalf: Be reconciled to God.