"It's not broadening the base," Sutherland said. "It's punishing the base."
Opponents criticized the food tax as a regressive tax that would disproportionately affect Utah's low- and middle-income residents, who spend a larger share of the dollars on essentials like food.
"It's a weird, unfair way to generate revenue for the state," said Bill Tibbitts of the Crossroads Urban Center.
Tibbitts was similarly skeptical of the corresponding plan to lower Utah's sales tax rate. The two adjustments might be revenue-neutral for state coffers, he said, but not for working families.
"If you buy a Ferrari, then you come out ahead," he said. "You have to spend an awful lot of money on non-food items, money that these families don't have, to come out ahead."
The demonstration on the Capitol steps came shortly after Voices for Utah Children released an analysis of various tax proposals under discussion at the state Legislature.
Matthew Weinstein, the organization's state priorities partnership director, said that increases in food and gas taxes have the largest impact on Utah's poor, while a proposed ballot initiative to increase the income tax from 5 percent to 5.875 percent more closely follows the distribution of income throughout the state.
Increasing the income tax rate to 5.875 percent would cost between $350 and $400 each year for a median income-earner, according to Voices for Utah Children.
That ballot initiative, sponsored by the group Our Schools Now, would raise $750 million for the state's Education Fund, with 2 percent of that total borne by the lowest 20 percent of Utah income earners, according to Voices for Utah Children.
But the lowest-earning 20 percent of Utahns would carry 9 percent of the cost of restoring the full sales tax on food, the report states.
Weinstein also said that while the cost of grocery taxes would impact all Utahns, the benefit of a decreased sales tax rate would be shared with customers from outside the state.
"It carries out a tax shift from in-state to out-of-state residents," Weinstein said. "Tourists don't buy a lot of groceries when they're here."
Voices for Utah Children, along with several community advocacy groups released a letter to lawmakers on Thursday. It states that new revenues are needed for state programs, but poor Utahns should be held harmless by tax reform.
"No one should be taxed into or deeper into poverty," the letter states.
Senate President Wayne Niederhauser said lawmakers are considering several different taxing options, including proposals that would lessen the impact on low-income Utahns. He said that everyone in the state should expect to have some "skin in the game" when it comes to funding state services.