In the grand scheme of the world definition of lower income, no. I haven't looked too deeply into it, but apparently 3rd world countries have as much or more sex, but have less access to birth control.

In the context of "first world lower income", I'd wager there's a loose correlation. i.e the incel movement is one mostly formed from a frustrated lower-middle/middle class (which in the world context, means many americans for the sake of discussion). Another comment in this post heard something similar as well: https://news.ycombinator.com/item?id=27041400

I'd be interested in any studies that disprove this notion. I'll admit most of this comment is conjecture.