It's not just farmers that own their farms that will be affected either.
I'm a tenant farmer, our landlords own 4 other farms one of which they farm themselves. They've had all the farms in the family for many generations and let them out at a very reasonable rate on long tenancies,
Presumably when the current generation dies they will no longer be able to hand all four farms on to the next generation in the family to keep farming/letting out to tenants - at least one farm will probably have to be sold, or broken up into parts to pay the tax.
Sure, they can afford it, but it will be the end of an era for that family and the great way they have been operating to ensure that traditional farming can continue in the area.
Which poor tenant farmer will inevitably get the chop and lose their livelihood?