after death everybody become a organ donor automatically

According to organdonation.gov there is actually 120,000 people in the national organ transplant waiting list. every day die 22 people waiting for an organ. If we calculate 22x365=8,000, 8,000 die per year waiting for a organ. there is only 15,000 people as donor. according to the article America’s rasing Death Rate Is a Sign of Several Scary Trends” by Laura Lorenzetti says that, every year around 100,000 people die in USA. According to organdonation.gov, one person can save 8 lives. If we calculate
100,000 x = 800,000. If we created a law that says everybody after death become an organ donator the national organ transplant waiting list will not exist.