I've brought up the issue of it being unfair that renters get to vote on measures or bonds that property owners have to pay. Most Liberals pushed back with the argument that it is fair because landlords will raise rents so that renters WILL have to pay for things they vote on... and now it's a problem?

You're exactly right Douglas. Renters are quick to say that they pay property taxes through their rent. So what's the complaint? If property tax goes up several hundred dollars per year, your rent should go up at least that much. Saying it out loud is not a threat. It's simply stating the obvious.