State regulators have been ginning up a scheme to charge a fee for text messaging on mobile phones to help support programs that make phone service accessible to the poor. The wireless industry and business groups have been working to defeat the proposal, now scheduled for a vote next month by the California Public Utilities Commission.

“It’s a dumb idea,” said Jim Wunderman, president of the Bay Area Council business-sponsored advocacy group. “This is how conversations take place in this day and age, and it’s almost like saying there should be a tax on the conversations we have.”

It’s unclear how much individual consumers would be asked to pay their wireless carrier for texting services under the proposal. But it likely would be billed as a flat surcharge per customer — one of those irksome fees at the bottom of your wireless bill — not a fee per text.