There is no evidence for this. It does not seem reasonable to me at all. Internal dialog is not consciousness.
Many of the people who discuss consciousness at length do not need or simply do not engage in any internal dialog at all.
We will never 'build' consciousness. It is not possible. Consciousness comes from a source outside of our realm of experience as a gift. It does not come from the micro or small things (though it is entwined with them and everything), but from the macro, that which is above all.