It isn't a popular tax. Death duties have been around forever and have never been popular. However, it is deeply misunderstood by many people who say they don't like it without understanding it.
Currently, a married couple (on the death of the 2nd person) could leave an estate of up to £650k before any IHT is due. A single person could leave £325k. Pension funds are exempt, as are any life insurances written in trust.
But homeowners whose children are beneficiaries can leave up to £1m (married couple) or £500k (single person).
So elderly dad with £400k house, £500k in pensions, some life assurance (written in trust) and £100k in savings/investments - not a penny to pay.
Wealthy widow with £750k house, a £800k pension fund and an investment portfolio of £300k - the estate would pay £20k inheritance tax. The pension fund is excluded and, of the rest, only £50k is subject to tax, if the kids inherit.
The vast majority of estates do not pay inheritance tax. It is a tax on the wealthy.
And yes, my kids will likely have to pay it when we die and no, we don't care to put mitigation measures in place - they'll inherit £500k each and only be taxed on anything above that, so they'll still be far better off than most.