New EU members and the need for a visa

Canada does not require a visa for the European Union countries, but the newest members of it DO need a visa to come to Canada.

What's the reasoning? Canada had too many refugee claims from countries like Czech Republic and Hungary when the visa was not required.

Now Canada is considering reviewing the visa requirement for Hungary, the Czech Republic, Latvia, Lithuania, Slovakia, and Poland according to nine criteria: Canada will consider each country's recent history in terms of visa refusal rate, immigration violation rates, and number of refugee claims. The countries will need to share information with Canada and must demonstrate that their passport systems are up to international standards.