To enforce insider trading laws in a "fair" way would require a massive expansion of the SEC and related agencies, which expansion would be funded by the general fisc for the specific benefit of investors. There are arguments to be made for that, but they seem similar to the arguments one hears for more aggressive enforcement of our drug prohibition. Those who argue loudest are interested parties. I'd prefer we reverse our many-decades trend, and experiment with less enforcement rather than more. I doubt we're capable of that, but sometimes I indulge in optimism.