When Christ Jesus healed sickness, fed the multitudes with a few loaves and fishes, destroyed sin, and raised the dead, he demonstrated the perfect government of God, good. That which is perfect is immortal. The mortal sense of imperfection and suffering disappears before the immortal, spiritual sense of life gained through Christ.
Jesus didn't establish a reign of material well-being. The only kingdom he recognized was the kingdom of Spirit. Spirit, God, and matter are opposites.
Spirit is Love, giving health, harmony, and holiness to all. Jesus proved that Christ, the spiritual idea of God, or Love, destroys the fruits of fleshliness—sin, disease, and death—and restores peace. But he didn't come to establish some sort of material perfection. Jesus demonstrated the government of Spirit in order to lift mortals out of materiality, not to settle them more firmly in it.