Some of the European Constitutional Courts are restricted to check the laws only when challenged by the president of the country, a High Court or a large number

Some of the European Constitutional Courts are restricted to check the laws only when challenged by the president of the country, a High Court or a large number of members of the Parliament (same people who voted it), ordinary people cannot do that and the check is not automatic. It solves maybe 5% of the problems with the laws that and non-constitutional because nobody can effectively challenge the rest.