We can argue the toss about whether a family home should be inherited by the 'kids' or used for care, but of course that can be got round - simply sell it and hand the money over to the kids tax free, it takes seven years or so, you can't pop your clogs before then.
All those who spent their money acquiring and renting out properties have a nicer old age to look forward to than the rest of us.
You also have a situation where if the parent is penniless and the son or daughter went on to make a mint, said offspring is not pressed to pay a penny towards care, the parent can sponge off the state, not unreasonably you might say, but the adult son could be a millionaire.
As for the whole euthanasia thing, erm, maybe wake up and smell the coffee. It's not 'euthanasia' if drugs aren't used, and it's not 'murder' if the resident is deemed to have lost mental capacity, see how those poor kids at Great Ormond Street are deemed to be brain dead, and life support is switched off - it's legal and you may say, quite right too in that case, or not, I'm just setting things out. Now, you try getting the care home to give your parent a drink when they've got past a certain point, or if they are deemed to have 'severe dementia' on the medical notes that you are only allowed to read after they've died. And, when you notice it aint happening with regards to the drink, see how the care home call in social services to fit you up when you press them on this point. Have you barred, and finish the job unimpeded.