I would say the difference is that as a property owner I have a long-term local presence and vested interest there, I am (in theory) motivated to make thoughtful decisions about local governance, as opposed to a disinterested bystander passing through and paying local sales tax on a soft drink.
I guess the Walton family has a long-term local presence in basically every mid to large town and city in america. Same with Mcdonalds Corp. They have vested interests there (crushing competition, raising prices, lower quality, profit!). And their bigly profits certainly show a more significant vested interest as opposed to just a small property owner or worse a bystander or citizen.
You can't have a presence if you're not present.
My parents own two properties, but they have to decide which one they are residents of, because they are not entitled to a say in how both local governments are run.
If I am a long-term owner of Google stock, I still don't get a say in how Mountain View runs their city. A "vested financial interest" in an area should not be enough to give one a vote on local laws.