For example you can gift someone a expensive building right before your death, because when you do die, they will be forced to pay so much inheritance tax, that they would have to sell the building, since selling the building is quite hard, it is likely the person will just go bankrupt, or go to jail.
EDIT: I misremembered something. The gift wasn't before death, it was on the will. ie: person die, and "target" inherits some expensive crap he can't sell.
I think it's based on comparable buildings and what they sold for recently.
For any billionaires out there, if you have unwanted buildings or want to punish me with a large tax bill, I will accept the punishment. Call me maybe!
The issue they have is retaining control over Samsung whilst having to pay inheritance tax. This is why the stock price rose significantly when Lee actually "died", he obviously legally died before that point the coverup was to maintain control over Samsung, because it looks like they have finally lost control.
So yes, these laws are taken pretty seriously.
Btw, the thing about the gift is true in most countries. The reason why should be obvious: if you could just gift before someone dies then no-one would pay inheritance tax. It is usually a few years: so if you receive a gift and the granter dies within a few years then it is subject to inheritance tax.
This is propaganda.
I have to wonder, there's a huge incentive to instead have the person somehow give huge gifts to everyone before death, right?