Obviously the human brain is more complicated than the current structural basis for AI

You're not comparing apples to oranges here... you are comparing apples to electric toasters.

So there’s no particular reason AI could not match or surpass human thought power.

You mean... apart from the fact that there's not even the most circumstantial whiff of evidence that these runaway algorithms will ever actually think?

These runaway algorithms already vastly surpasses humans in the ability to crunch numbers and multi-task (the latter is actually quite impossible for humans to do, in spite of the whining of the managerial classes) - no surprise, since that is what information technology was invented to do - and yet, that hasn't resulted in one of them doing anything that can be considered "having a thought."

At this point, I think you might want to ask why it is that you assume that consciousness is (somehow) the end-goal of the development of these glorified paper-clip machine simulators (since that's seemingly the most accurate way of describing them) - after all, the last thing the capitalist class needs is a paper-clip machine that thinks.

Consciousness is not that big a deal, you know - there's eight billion examples of it walking around on the earth currently, and the spoilt and privileged people creating these runaway algorithms absolutely does not care a fig for any of them.