Amsterdam's actingmayor Lodewijk van Asscher told local television there was a threat that supporters of Ajax - the city's team - wanted to fight English fans.
"The police have to understand the communities that they are serving better, and be more supportive when police officers are acting improperly, " the mayor said.
An office of the mayor, which said it was acting in cooperation with the national health ministry, last summer sent letters ordering most of those collecting the benefit on Zakynthos to an Athens hospital for vision tests.
As a fellow entrepreneur with a public-service orientation, I have been a longtime admirer of Mayor Michael Bloomberg's entrepreneurial spirit and commitment to acting on his principles.