This issue is at least somewhat perceptual. If you have to charge everyone the same, but some patients cost more, then you raise the prices to account for the f

This issue is at least somewhat perceptual. If you have to charge everyone the same, but some patients cost more, then you raise the prices to account for the fluctuation and the other patients subsidize the more costly one. If, instead, the extra cost were covered by a tax rebate or something, then the cost is still subsidized to the other patients. Effectively, it isn't any different, it's just a matter of accounting. Making the disabled person pay extra for their services makes the flow of money more obvious, but at the expense of cruelty. I doubt many want to see that be the norm, but I think the result is then an argument of who sees the subsidy being paid on a bill. The doctor seeing a $30 loss on one patient and everyone pays $1 more, or 30 patients seeing a $1 interpreter fee.