Some people will change their behavior and that's ok- because they'll be able to see with their own eyes, while they are still alive, the damage they'll do on their own family and maybe on society too.
That could induce other changes, such as them giving conferences to other people considering doing the same of the damages of 'unearned money'.
And even if only 1% could be shaved of the business and income tax, that'd be a move in the right direction - and sending a good message.
The idea is not so much increasing government revenue (I'd rather see it lowered to limit the waste) but reducing the damages caused by the whole idea of 'inheritance'.