compliant - Being willing to do what one is asked to do, following set of rules, regulations, and standards.

Though most people don't enjoy paying taxes, they are compliant either because they feel it is right, or because they fear getting caught if they cheat.
paradox - A situation or idea that seems strange because it involves two aspects that are very different and seem to contradict each other, and both may be true.

It's a paradox that often it's the busiest people that have to most time to contribute to the needs of others.