I am sixty-three years old. I have no savings, no retirement, no property, about $30,000 in medical debts that I have been slowly paying off, no credit cards. I live on a fixed income, which after paying all my expenses for the month, generally leaves me with $150 to $200 to spend any way I wish. I treat myself to a dinner out twice a month, go to a movie every two to three months, buy books I enjoy reading. I have a forty-one year old married daughter, whom I do not expect to pay for my future care or any of my debts once I am dead. Since I no longer own any real property, the hospitals I still owe will be out of luck.
Children of irresponsible adult parents, who are adults, can no longer be held responsible for their parent's debt, unless they sign an agreement to accept the responsibility. Those that do own property are subject to their state's laws regarding seizure of such property to pay state debts. Here in Florida, a spouse may obtain medicaid and remain in the home until their death. The property is then sold and money applied to what the state has paid out. Rarely is there anything left over.
For those who have irresponsible parents, that parent is responsible for their own bills. If you do not want to be held responsible, do not sign any agreements that hold you responsible.
A bit of an aside. I had a retirement fund, owned a condo, had bills, which I was paying, had a savings account. A bad accident wiped out my savings, the government took half of my retirement when I cashed it in, in an attempt to save my condo, the bank took my condo. I have not been able to return to work and I have not been able to save anything. I am dependent on Social Security. I don't think I have been irresponsible. Perhaps I could have planned a little better but hindsight is always better then foresight.