My objection to that statement is that designing political systems is not about doing a better job (on average). It's about not doing a worse job (ever). Rawls calls this "maximin": you choose the option that maximizes the minimum possible value. The maximum possible value is irrelevant, and the average doesn't matter, either. When lives are at stake, you always choose the safest option, the one with the lowest chance of descending into tyranny.
I'm sure technocracy has the potential to soar higher than populist democracy under many circumstances, but unfortunately it also has the potential to crash just as hard as, if not harder than, most democracies can ever dream of. Without giving others the power to overrule technocrats, it's only a matter of time before technocrats become autocrats. Anyone in a position of power who can't be fired is a Stalin in the making. I don't see how that's "not worse" than any democracy. A populist democracy has a reliable way to throw a political leader out of his job or at least get him to change his mind: throw up a shit storm like we did with SOPA. It's dirty, it ain't easy, but once you manage to do it, it works like a charm. And in the end, keeping little Stalins at bay is all that matters.
Power tends to corrupt. Any political system that depends on trusting a group of people to do things right will invariably fail because of corruption, and technocracy is no exception. The only solution is to design a political system that harnesses the power of distrust. When all alternatives are necessary evils, you choose the most controllable option because a controllable evil is almost always less bad than an uncontrollable evil. Of course, evils aren't easy to control even under the best circumstances, but do your best to find one that you can at least put on a leash.
So the best government isn't one that is not subject to control by any political interest, because objectivity and neutrality in politics are never going to be anything more than daydream. Rather, I think the best government is one that is open to control by so many conflicting interests in so many different ways that the vectors eventually balance one another out. Politics is meant to be dull, boring, and utterly predictable. Because when politics gets exciting, people die! It's OK if you want to give up your own life for a cause, but don't put others' lives and human rights in peril.
tl;dr for technical readers: the performance benefits of putting a bunch of spinning platters in RAID 0 ain't worth the inevitable data loss. Especially if your data == human lives.