The longer and more complex answer is to raise people to respect of copyright law. What should society expect in return for giving individuals and companies a time limited monopoly? A mandatory license given to libraries would be appreciated symbolic gesture. Different categories could also have longer or shorter duration depending on that markets needs and requirements, and government could measure the market impact that such time limited monopoly has and see if the benefits of market intervention is greater than the drawbacks (just like any other market regulation). Marketed products towards children and young adults could get additional regulated in order to reduce the differences in access to culture between the poor and rich.
Such changes are however extremely unlikely to happen due to extensive overlapping international agreements that has cemented the long copyright terms of 75+ years after the author death.