For all the fear-mongering the media-zeitgeist tried to stir up about Mamdani's NYC mayoral campaign, I find his policies measured and fiscally responsible. A second mansion in NYC does seem excessive, and the tax could free up supply. The tax rate isn't outrageously high, if I'm wealthy enough, I'll just pay it, otherwise if I'm on the cusp, maybe it's better to sell and liquidate. Feels like a Keynesian policy at its finest.