I agree that it is sad, but it is a real consideration. Nearly every environmental proposal has the potential increase hardship on low earners. Most commonly, this comes in the form of higher costs for consumer products, utilities, and housing.

There are are a lot of similarities with road congestion pricing going into effect in San Diego and NYC, and planned for LA and SF. Who will bear the greater burden, high earners who can easily pay the fee or low earners with rigid schedules.