I don't live in the US, but NIMBYism is rampant here as well and all the practical instances I have witnessed were initiated and carried by dyspeptic pensioners with sincere hatred towards any change.

"But CHILDREN will SCREAM here!" shouted one such lady at me when I dared express my opposition against her petition, which demanded a stop to a "megalomaniac" plan to build approximately fifteen apartments half a kilometer away.

"You were a child once, too," I said.

"Sure, but I was A GOOD BEHAVED ONE, NOT LIKE TODAY'S BRATS!" at that time, she was positively screaming as well.

M'kay.

The situation in the US may be different, but the few YIMBY blogs and articles I have read mostly described their efforts as an uphill battle against progressive politicians who were certain that development leads to gentrification and gentrification is bad. Given that the YIMBY movement originated in California, this may just be an aftereffect of Californian politics. But in general, it is blue cities and regions that are known for very restrictive zoning policies.

Many of the NIMBY property owners are not nearly wealthy enough to be affected by most wealth tax proposals (e.g., the "few tens of millions" suggested in the article).