Wat is het idee?
I suggest that Zilveren Kruis offers a package that includes a basic checkup - which could have optional services.
I believe many people would be willing to pay to have preventive medicine as part of their heath package.
Personally I know many people, including myself who are currently travelling to have their checkup exams abroad. Or I hear people saying they need to fight to have any exam done - as this is not practice.
Currently I feel there is no preventive medicine being offered - which for some diseases plays a key role for treatment and recovery (e.g. Cancer).