Why do Japan and Singapore have less public servants than Canada as a percentage of their population?

https://worldpopulationreview.com/country-rankings/public-sector-size-by-country

Just reviewed this page and wanted to inquire. Are there any policies in place that differ between the three countries that would warrant Canada to have such a high public service employment relative to Japan and Singapore?

Are we comparing apples to apples? I saw that Norway and Sweden, countries I would typically consider comparable to Canada, have almost the same amount of public service employment as a percentage of the overall population.

I'd love some analysis on this.