Jos de Blok, CEO of the Dutch homecare group Buurtzorg, has announced that he will enter the statutory health insurance market in 2017 with lauch details on December 6. Four big insurers - Achmea, VGZ, CZ and Menzis – have 90% of the market. Sources say there have been no successful new entries for 34 years. Could Jos de Blok break the curse?