> Why, as a rational actor, would I voluntarily choose this system over one that gives me the freedom to decide what the government sees about my spending? Bec

> Why, as a rational actor, would I voluntarily choose this system over one that gives me the freedom to decide what the government sees about my spending? Because this system ensures fair play of all participants, therefore making cooperative behaviour the rational choice, therefore enabling more efficient solutions on a societal level. Proper game theory (which I assume you were referring to) is bit more complex than the prisoner's dilemma.