Even if the data collection software was perfectly informed in regards to goods and services (very doubtful) it is still a bad idea to put the reins of economy into the hands of a few people. Consolidation of state power and the power of capital into a single entity has resulted in totalitarian regimes. Even the examples listed are basically exemplars of everything bad about modern corporations. Putting politicians in charge of such a system won't automatically make it a force for good.