We don't have to. There are many complicated jobs that aren't white collar but still require a highly skilled individual and are not currently achievable by robotics (millwrights for example).
The OP is referring to removing monotonous, simplistic, repetitive jobs.
Do you have a citation for that? I would be interested in seeing that. According to the Chinese government (which has been accused, in fairness, of fudging the numbers) their unemployment rate is highly stable.
Historically, as countries transition from developing to developed their workforce will shift from primarily non-skilled labour to primarily skilled labour [1]. China appears to be following this line naturally, if you trust their reported unemployment rates.
[1]: http://images.slideplayer.com/21/6263323/slides/slide_12.jpg
Basically hiring people to dig and fill up white-collared holes.
The generation preceding the current generation will be better educated and take-on the more skill demanding jobs.
Sure it will, because it'll force large social changes and such changes are interesting regardless of whether they're bad or good.
World War III breaking out would most certainly be considered "interesting" news, although there is absolutely nothing positive about it.