Perhaps it's because the list is strange?
This is the ranking for 2005 from the source most used by companies to set cost of living allowances:
1 Tokyo, Japan
2 Osaka, Japan
3 London, United Kingdom
4 Moscow, Russia
5 Seoul, South Korea
6 Geneva, Switzerland
7 Zurich, Switzerland
8 Copenhagen, Denmark
9 Hong Kong, Hong Kong
10 Oslo, Norway