What is the alternative to permitting HFT? If we ban direct communication between the algorithms and the exchanges, we will merely create a great deal of busyw

What is the alternative to permitting HFT? If we ban direct communication between the algorithms and the exchanges, we will merely create a great deal of busywork for the thousands of people who will be hired to manually enter the orders produced by the algorithms. If we ban the use of algorithms altogether, we will be legislating inefficiency into the market, to the extent that there can be inefficiencies that are not worth the man-hours to manually discover. We may also have a hard time enforcing either of these approaches. I wonder how much it would cost us?