As a Roman Catholic I believe, as Jesus taught, that liars are damned. What could be more precious in this world to me than my immortal soul (and the souls of my loved ones)? Jesus taught, 'What good does it profit a man if he gains the entire world and loses his soul?' I believe that God will reward me thousands of times more in heaven than any treasure I could obtain through sin here. Lies offend God, who I love above all else, and who is the source of goodness and truth. Not only would I not accept any amount of money to sin, but I would choose death if that was my only other option. You may find that absurd, but that's my worldview and faith. I think it's sad you can't believe me.
I have told my children who I love vastly beyond any earthly treasure, "I would rather have you dead in my arms than see you in a state of mortal sin." That's what queen Blanche would tell her son Louis, as recalled by the great moral theologian and Doctor of the Church Saint Alphonsus Liguori, who commended her for her faith and held her up as an example for good parents to imitate. Because if you are dead in my arms and passed in a state of grace, then you have died a friend of God and will share in his blissful divine life forever, but if you are alive in mortal sin, you are on the edge of Hell and eternal damnation apart from God and all love and goodness. This is also the reason, again, as St. Alphonsus teaches, that I have prayed numerous times, "God, please take my life if you forsee that I will fall into mortal sin." I have numerous friends, a wife and a priest who I am certain would sooner die than commit a single mortal sin. If fact, one of the tests you can give yourself to check if you are in a state of grace as a Catholic, is to ask that very question, "Would I rather die than commit a mortal sin?" If you can answer "yes" honestly, you are almost assuredly in a state of grace. Would lying publicly for money be a mortal sin? Perhaps. It might depend of the circumstances such as the subject of the lie, if there was any compulsion involved, for what purpose you were going to use the money, etc. Either way, it would be very, very dangerous for my soul, no doubt.