This is presumably a large part of the reason for health insurance and public health cover (medicaid in the US). This causes a principal-agent relationship whe

This is presumably a large part of the reason for health insurance and public health cover (medicaid in the US). This causes a principal-agent relationship where the decisions are made by health insurance companies (the 'agent') rather than the person who needs them (the 'principal'). This, of course, has it's own set of issues.