> As cities grow in size, the poor 'get nothing at all': study

This is wrong

As cities get bigger everyone benefits as expected confirmed by the study -

"We show that income in the least wealthy decile (10%) scales close to linearly with city population, while income in the most wealthy decile scale with a significantly superlinear exponent."

"We repeat our analysis after adjusting income by housing cost, and find similar results"

https://www.researchgate.net/publication/349682590_Scaling_o...