Final answer:
Increasing the price of healthcare is the least likely action to increase healthcare provision to children, as a higher cost could discourage usage of these services.
Step-by-step explanation:
The least likely measure to increase the amount of healthcare that people provide their children is E. increase the price of healthcare. Generally, when the price of a service increases, the demand for that service tends to decrease, unless the service is inelastic, meaning the demand for it is not highly responsive to price changes. In the context of healthcare, however, especially for children, an increase in price without any accompanying increase in the ability to pay would likely result in less healthcare being provided to children.
Conversely, actions like lowering regulations on who can provide healthcare (A), subsidizing healthcare (B), reducing the distance traveled to get healthcare (C), and providing coupons for free healthcare (D) are all measures that can potentially increase access to and the provision of healthcare services.