250 kts.
Sadly I have to agree with you. Some of the ATCOs who are none operational are not there through choice. Some for medical reasons and others who have done their 30 years or so and can't quite keep up at the peak periods. Not their fault at all. They have given there best years to the company and their colleagues, and must be respected and assisted by all, so that can reach their retirement with their dignity, and more importantly their health, intact.
Those who come out with these kneejerk reaction need to think a bit about how they wish to be treated in the later years of their career. Yes there are some who try to do as little work as possible, and we all know these people, but many are good people with much knowledge and still have alot of interest in their fellow younger ATCOs.
Think about yourself in a few years and how you would wish to be treated. It will arrive quicker than you think, the alternative doesn't bear thinking about.