There is evidence that economic growth in the last 50 years is positively correlated with increasing inequity (based on UN and World Bank data). Here’s a short video exploring conflicting inequity measurements. It’s a follow up of the video What is happening to poverty? (Rammelt and Surace) that explored conflicting poverty measurements.
Note: The third graph shows inequity of the population divided in deciles. This hides further inequities within the deciles. The 0.01% super rich pull the richest 10% up a lot (see The 99.99% versus the 0.01% (The Guardian)). (Thanks for pointing it out Alex.)