The intended deceit of the "tax calculator" is that it only shows the "tax" consequence which is only half of the story. It is totally designed to incite outrage among taxpayers who believe they are already overtaxed.
As the author duly noted in the article, the tax increase applicable to the workers is due to single-payer health care. An honest calculator would show the net out-of-pocket savings from his Medicare For All Plan.
The "tax calculator" represents one of the most misleading representations I've seen in a long time as it intentionally presents only half of the story. In fact, I believe it is materially negligent.
The gross bring-home pay is not the important number ... it is the amount of money the worker has left in his/her pocket after paying for the necessities of life ... including health care!
Additionally, Senator Sanders' Medicare For All Plan provides coverage for vision, dental and hearing! These are health care benefits that most people do not currently have with their existing health care plan.
 A calculator or illustration the Senator Sanders' campaign needs to be showing frequently to fend off false and misleading representation of his Medicare For All Plan by his opponents.
 People need to be shown how Senator Sanders' Medicare For All Plan actually puts money in their pocket compared to heir present health care plan because there are no outrageous deductibles and co-payments.