The introduction further clarifies the author's definition of the type of innovation that gets disincentivized. "Basic research", i.e. innovations in our understanding of our world, are readily funded by the redistributed tax revenue. "Applied innovation", that which applies the outputs of basic research, includes the creation of Amazon.com or the latest improvements to Google search. This applied innovation is what gets disincentivized.
I personally agree with you that this is a shaky, unsubstantiated foundation for an argument about optimal tax policy.