5 Billion Years Alone - J E Murphy - Bog

In a not too distant future, the long dreamed of goal of immortality has become a reality, but only for the extremely wealthy. And even they can barely afford the annual maintenance. The rush is on to squeeze every bit of value from every resource, and all compassion is intentionally abandoned. That is until one of the immortals accidentally turns his compassion back on, and leads a revolution against his fellow immortals.