Dubai has problems much deeper than basic wealth stratification. 90% of the demographic doesn't have basic citizenship or a path to such citizenship. Even families that have lived in Dubai for generations of don't have citizenship or the same basic rights as the nationals. The society is also not a democracy with public elections. That's more of a blood line apartheid system.
Brazil or South Africa is probably a better example of a semi-Democratic society with extreme wealth stratification. And yes, it seems to correlate with conflict.