@zdl I doubt the accounting for many of those claims.
“Italy and Russia have been wheeled out as examples of countries that spent far less on Y2K, and yet have emerged unscathed. But claims that the Italian government spent only £1.6m on on the bug are misleading. According to GartnerGroup, £1.6m is simply the running costs of Italy's year 2000 co-ordination office. The figure takes no account of the billions spent by government departments and Italian businesses testing, upgrading and replacing equipment and software. Russia, strapped for cash, has genuinely spent far less than the UK, but its work is far from over.”
https://www.computerweekly.com/feature/Was-Y2K-a-costly-non-event
“'Nobody knows exactly what Russia spent because a lot of the information is not published, but I estimate that the government and its agencies - including the military - spent around $50m and Russian businesses around three times that,' Terekhov [head of Russia's Competency Centre for Y2K] said.”
https://www.theguardian.com/business/2000/jan/09/y2k.observerbusiness