There is one way a wealth tax probably wouldn’t be passed down to renters.

If everything over a certain point is taxed at 100%.

Including stocks and all that stuff that rich people typically store their money.

That way it doesn’t matter if they increase the rent they still won’t get more money out of it so there’s no point in increasing it.

They may be incentivized to sell properties in that case to bring property values down and therefore rent.