Thanos was right to snap away half the population of the planet?
I mean, what happens if you take away half the humans? Sure, there's broken hearts and drama, but wages go up and the surviving population seems to be doing great. Bring billions of humans back with no warning, and it leads to mass poverty and unrest. And it's all there in the show.
None of that was in the show, and nothing you wrote makes sense. Why would wages go up? With half as many people, there are half as many jobs to serve half the demand, so the status quo is maintained. You might argue there are more resources, but we currently have more resources than we can use, and it's more about having the demand for them, and the manpower to extract/convert/utilize them that matters.
If half the population vanished, there would be vast, possibly insurmountable emotional damage, but in pure economic terms, nothing would change other than the total volume of goods being produced and used.
Thanos was evil, and a moron to boot. Cutting the population in half, even if it had any positive consequences, would only take the population back to where it was 50 years ago. Big whoop. Before long you're right back where you were.
And half the people being vaporized cuts the economy in half, instantly (by definition, if the snap is truly random and takes the productive and non-productive alike).
With the power stones he could have just doubled the number of inhabitable planets and accomplished the same goal without killing anyone.