In Norway they have much higher taxes during their working lives though.
The real issue is that a lot of people alive today have not been taxed highly enough during their working lives in order for the benefits they will receive in old age and the other money that the country has spent on infrastructure or defence during their lifetimes.
The country has also maxed out its lending capability on things like covid, so it is not possible for politicians to take the previous easy route by simply borrowing money.
So the country needs more money from somewhere. It can get this from
a) Taxing workers. The problem is that there is a relatively small proportion of workers and they are getting increasingly taxed out.
b) Reducing spending. This is difficult as there is an increasing amount needed to be spent on infrastructure, net zero and defence. Benefits such as pensions adult social care are at high levels due to demographics.
c) Taxing "the rich". Everyone seems to get on board with taxing the rich. There are three problems with this. Firstly the rich are mobile and can leave, secondly they can employ armies of accountants to avoid taxes and thirdly eveyone seems to be happy taxing "the rich" until they find out that they are actually "the rich" at which point their ideas on taxing them seem to take an abrupt about turn.
d) Growth.
I think inheritance tax in general is a good thing for a number of reasons. Firstly, it taxes those that have most benefited from the underpayment of taxes. Secondly it taxes those that are in general rich. Thirdly it taxes them at a point in their life where they no longer need the money and finally it helps level the playing field with people who do not get an inheritance and thus makes life more equitable (IMO).
In general I think the country does need more money, and it can only really get that money through either growth of the economy or taxation. If it is to get that money from taxation then the middle class are the only sector that can really come up with the amount of tax necessary to make a difference.
Inheritance tax as a tax is a bit of a mess, because many people avoid it. Loopholes need to be closed in order to stop this avoidance.