It guarantees us employment on multi-national teams doing appraisal work, is an off-beat way of looking at it. Although the frugal dutch, swedes, finns have a similar hard grounding in social benefit/cost, financial and environment analysis, we're the ones who think 'is it really worth it' at every step because that's what it's like back at home.
The Tanger thread made me think. If it had been Britain, in 2000 we would have assessed the 2010 opening demand, planned its timetable, and added some possible growth to 2025 then probably built 3x200m platforms with a bit of room for expansion. Spanish consultants can do it much faster: 8 trains per day means 8x400m platforms at the terminus.
The Irish might be unhappy at sharing a mentality with us after a century of independence, though.