The comment claims that it isn't possible for lower taxes to increase tax revenues. It's possible whenever the taxpayers would have used the money more producti

The comment claims that it isn't possible for lower taxes to increase tax revenues. It's possible whenever the taxpayers would have used the money more productively than the government. Which may not always be the case, but it's certainly possible for it to be the case, and indeed is not an implausible default assumption because governments generally aren't subject to competitive pressure and consequently tend to allocate resources in ways susceptible to inefficiency, waste and corruption.