Historically that has been true, but couldn't technology help? Like, issuing everyone a smartphone and having them register all demand and make all purchases through it. The rest is a problem of keeping capital from aggregating at the top.
No, it's a fundamental structure problem, not a technology (aside from the sense in which an economic system is itself a social technology) problem.
> Like, issuing everyone a smartphone and having them register all demand and make all purchases through it.
From a utility signalling perspective, that's not significantly different in the information it provides than just retaining currency for consumer purchases, which state socialism generally has.
The trouble with governments as it is is that they make decisions In an extremely non-robust way...
The robust way is supposed to work like a many-worlds predictor- corrector pattern and that's just one way. It is an order of magnitude or two more computationally intensive. (Think robust weather predictions and modelling.)