A lawyers and accountants' picnic! Don't think so: testamentary trust structures would probably get around it.
What I read was 'tax the 1% when they die' and then 'give the money to first home buyers as a deposit'. It's supposed to make housing more affordable. Not sure how it makes housing more affordable, it's more likely to increase house prices. That's assuming the money does actually makes it to the FHBs. The 1% all over the world have also proven to be very good at avoiding paying these sorts of taxes.