Hindu leader Rajan Zed of Reno along with a group of Christian, Buddhist and Jewish leaders is asking Starbucks to stop charging extra for vegan milk alternatives, saying the practice amounts to a tax on people who have embraced plant-based lifestyles. In a statement, an interfaith coalition led by Nevada-based Hindu activist Rajan Zed pressed the coffee chain to end the surcharges it called “unethical and unfair.”

“A coffee company should not be in the business of taxing individuals who had chosen the plant-based lifestyle,” said Zed’s statement, which was also signed by Thomas W. Blake, an Episcopal priest; Greek Orthodox clergyman Stephen R. Karcher; Buddhist priest Matthew Fisher; and Jewish rabbi Elizabeth Webb Beyer.

The religious leaders cited numerous reasons why some Starbucks customers prefer alternatives to dairy, including dietary restrictions, ethical issues, environmental concerns, lactose intolerance, milk allergies and animal welfare.

Those who want plant-based milk should not have to pay more, they said, calling on the Seattle-based company’s CEO, Howard Schultz, and board chair Mellody Hobson to immediately drop the surcharge.

Starbucks outlets in the United States typically charge 50 cents to a dollar more for drinks made with plant-based milks.