I'm not sure it's ironic.
This is exactly what "positive discrimination" leads to. Did you get the job because you're good, or because you help meet the quota...?
Did you get the top pay because you earned it, or because paying you less could open the doors to a discrimination claim?
This is the mess that positive discrimination and race/gender quotas gets you to.
Because this chap thinks he has evidence for positive discrimination, which apparently isn't legal over here (yet), he's now suing for being on the losing end of that discrimination.
I've taken a look at HMIC salaries (2017 is the latest available unfortunately).
https://www.gov.uk/government/publications/hmic-structure-and-salaries-2015
https://www.gov.uk/government/publications/hmic-structure-and-salaries-2016
https://www.gov.uk/government/publications/hmic-structure-and-salaries-2017
March 2015:
£195000 (staff cost is £0) - HMIC - Sir Tom Winsor
£185000 (staff cost is £1370000) - HMIC Eastern Region - Mike Cunningham
£185000 (staff cost is £1490000) - HMIC Northern Region - Zoe Billingham
£190000 (staff cost is £1680000) - HMIC National - Stephen Otter
£190000 (staff cost is £1390000) - HMIC Wales & Western Region - Drusilla Sharpling
September 2015:
£195000 (staff cost is £500000) - HMIC - Tom Winsor
£185000 (staff cost is £1080000) - HMIC Eastern Region - Mike Cunningham
£185000 (staff cost is £1380000) - HMIC Northern Region - Zoe Billingham
£190000 (staff cost is £1660000) - HMIC National - Stephen Otter
£190000 (staff cost is £0) - HMIC Wales & Western Region - Drusilla Sharpling
March 2016:
£200000 (staff cost is £0) - HMIC - Tom Winsor
£185000 (staff cost is £770552) - HMIC Eastern Region - Mike Cunningham
£185000 (staff cost is £591352) - HMIC Northern Region - Zoe Billingham
£190000 (staff cost is £590422) - HMIC National - Stephen Otter
£190000 (staff cost is £0) - HMIC Wales & Western Region - Drusilla Sharpling
£0 (staff cost is £727044) - HMIC Wales & Western Region - Wendy Williams
September 2016:
£195000 (staff cost is £0) - HMIC
£185000 (staff cost is £880000) - HMIC Eastern Region
£185000 (staff cost is £770000) - HMIC Northern Region
£140000 (staff cost is £560000) - HMIC National
£190000 (staff cost is £40000) - HMIC Wales & Western Region
£185000 (staff cost is £770000) - HMIC Wales & Western Region
March 2017:
£195000 (staff cost is £0) - HMIC - Tom Winsor
£185000 (staff cost is £1050000) - HMIC Eastern Region - Mike Cunningham
£185000 (staff cost is £820000) - HMIC Northern Region - Zoe Billingham
£140000 (staff cost is £670000) - HMIC National - Matt Parr
£190000 (staff cost is £40000) - HMIC Wales & Western Region - Drusilla Sharpling
£185000 (staff cost is £820000) - HMIC Wales & Western Region - Wendy Williams
September 2017:
£200000 (staff cost is £210000) - HMIC - Tom Winsor
£185000 (staff cost is £1060000) - HMIC Eastern Region - Mike Cunningham
£185000 (staff cost is £820000) - HMIC Northern Region - Zoe Billingham
£140000 (staff cost is £550000) - HMIC National - Matt Parr
£40000 (staff cost is £0) - HMIC Wales & Western Region - Drusilla Sharpling
£185000 (staff cost is £860000) - HMIC Wales & Western Region - Wendy Williams
Is it discriminatory? I suppose we'll find out.
Edit: Added staffing cost, pretty sure that is what is meant by "Salary Cost of Reports".