I'm not sure why the submitter/story takes a conspiratorial tone about surge pricing but then proceeds to basically explain that surge pricing successfully solves two of three scarcity problems.
The most immediate way to increase supply is to reallocate available resources to where demand is higher. You WANT cars on the road now to go where there is greater demand.
Price increaes help reduce demand from people with lower priority travel requirements and allow those with higher priority travel obtain transportation by allowing them to use willingness to pay a signal of their greater needs.
The only thing it appears to be failing at is increasing the aggregate supply. Uber many need to provide an additional incentive to draw in inactive drivers, like some kind of bonus for drivers inactive for the N previous hours to become active again (such as guaranteeing at least one surge priced fare if surge pricing stops before they can obtain a fare within some time window, even if Uber has to cover the differential).
The only conspiracy in my mind with surge pricing would be if Uber enables it WITHOUT a concurrent increase in demand. If they are just enabling it because its raining even if there's no increase in demand, they're just opportunistically increasing fares. I might buy into the notion that they may be predictively enabling surge pricing IF they coud produce the data that says that some event X results in a Y percent demand increase historically; in that case they may actually be signalling additional supply and doing some good.