Beyond not just "not violating your principles," it's necessary accounting. If the public pays for part of the costs of something -- say of cleaning up after ex

Beyond not just "not violating your principles," it's necessary accounting. If the public pays for part of the costs of something -- say of cleaning up after extraction or pollution -- you haven't accounted for its costs. Without proper accounting, unprofitable businesses can thrive and would-be profitable businesses fail. No economic system can sustain itself without proper accounting.