Capitalism

You can't automate your way to healthcare. People need socializing, nurses to care for their needs, doctors to make adjustments, housekeepers to check in and assist in daily tasks that people just can't do. And even if Futurama style robots were invented in the mext 5 years, there is no way in hell anyone would be comfortable with them being the principal caretakers of the elderly. That's on top of all the other healthcare needs of the working population. Immigration will only get come countries so far, and will lead to further brain drain of poorer areas.