I love news stories. The poorest can't get poorer than the minimum wage; which was recently set to rise even higher, and up to £9 and an hour by 2020. And yes, it skews the average since it's a lower effective increase of 1.1%, but frankly, it's again three times the inflation or more. It doesn't matter where we end up in the world or how much we gimp immigration to favour the home team: unskilled or semi-skilled labour won't net you a middle (median) income. Artificial shortages, protectionism and other nonsense will only do long-term harm.
And yes, unemployment has everything to do with it: more people in employment, more demand, more wealth, more jobs created; then wages begin to head up. Competition has dampening effects, but it cannot outstrip a healthy, growing economy, with a growing consumer spending power and confidence. That's the trick with economics: it has more than one factor, and isn't a straight line with isolated variable, working off anecdotal assumptions.
The wage growth outstripping inflation is good -- your money goes further.
Wealth distribution we can talk about, but this again conflates a global factor and a general critique of capitalism with the EU, which apparently embodies everything wrong with the world and business; and yet the standards of living have risen ridiculously postwar, and continue to crawl up, albeit not at a break-neck pace of a fresh face like China, which may still hit the middle-income trap anyway.