Why can't the two be bad in their own way? It's like the mob switching from extortion to burglary, and saying, what, you didn't want us threatening people so we're not – now we're just stealing; what more do you want from us? I guess it's damned if we do, damned if we don't...
I did not, however, miss the part of the article that explained why charging for early access to information is socially useful (it pays for the information to be gathered). But I guess if a human uses that info it's ok, while if a machine uses that info it's evil. Or something.
I don't believe that he wants to prevent anything, but he suggests that trades should be taxed to create some value to society from this. He is suggesting their value (at the moment) is exclusively to the benefit of making rich people - who can pay for access early information and technology - richer.
Unfortunately for your argument, our stock markets are. They wouldn't be remotely viable if they weren't supported and regulated by government. In exchange for the tax payer funded assistance is the social benefit of keeping the whole thing running.
Or would you like to test the viability of a market with no government oversight and no government enforcement of contracts?
If you want to claim an HFT shop is "quasi-governmental" because contracts are enforced, then basically every enterprise in the world is "quasi-governmental" (except for the black market).
Second, copyright enforcement and free speech have defined limitations for the betterment of society.
The corollary to that is that your trades as a mere producer are never going to be [indirectly] profitable because all potential profits from varying price have been swept up by others who're not producing goods/services but instead are only operating to extract value that would otherwise go to producers.
It's really concerning how little people itt understand about markets
Is it worth the cost?
There's no reason to believe total taxes collected will decrease. If actors still benefit from HFT post-taxation, they will still trade, and pay the tax.
Lots of people who lived on being in a racket where passing orders and pushing buttons was extremely valuable saw their livelihoods endangered. Now the same happens to people who make a living on trivial short-term market decisions. Computers do it better and quicker.
Damned if they do, damned if they don't I guess.
The authors reasoning in going from HFT engaging in speculation to a financial transaction tax is unclear. He wants to prevent speculation and information gathering? Or prevent people from speculating quickly?