One could argue that giving someone latency for money is an inherent disservice to every other investor - whatever strategy you are following, you're getting opportunities before everyone else. One approach would be to have exactly one kind of connection to an exchange with a fixed delay level that everyone has to live with. Another approach is to have a small on every kind of transaction (Edit: other claim HFT pay a small fee and I am no expert but it's clear one could decrease HFT by raising transaction fees).