As countries have become wealthier, they have devoted an increasing fraction of GDP to education. There have been several waves of massive increases in spending. First came elementary schools, then secondary ones, and finally higher education. There is no sign they will. The economy is growing, and with increasing world integration, there is a consensus that the only way for the rich countries to stay ahead is to upgrade the skills of the workforce.
Individuals also have a strong incentive to improve their education.
Earnings of college graduates are much higher relative to those with only high school diplomas than before. As a result, college attendance rates have increased in all economic classes. Society is paying a lot for education now, and since the value of education is growing, we can expect society to continue paying at least as much in the future. The most likely answer is through stress on the quality of its teachers in their other roles. As with business travel, the leveling by technology of a part of the competitive landscape is likely to lead to greater emphasis on the human element, even when the results are hard to measure.