Trump considers yanking security clearances of his critics

Not necessarily, if you got out/retired and there's still time left in your current clearance you don't lose it in case you get a job right after that requires it, when the time is up and it needs to be renewed and you don't do anything then you lose it (unless you did something to lose it beforehand). You'd have to restart the process once that happens.

You keep your clearance but you lose access until it is required for your job again. Your clearance terminates after 5 years unless it is renewed (7 if you're still working in a position that requires it).

Actually:

8. How long is my security clearance good for after I leave the federal government?
The Department of State will revalidate a security clearance if (1) the individual has not been out of federal service for more than 2 years and (2) if the individual's clearance is based on an appropriate and current personnel security clearance investigation.
https://www.state.gov/m/ds/clearances/c10977.htm#8

That's from State Dept. So you lose access once you leave government service but you can have it revalidated - as in an agency or organization is more likely to revalidate it if you have had one and it's been recent.

Clapper resigned in Nov 2016 - I'm not sure he still needs access at this point. It's almost 2 years later - I don't think the current DNI would still be going to him.
Hayden hasn't been CIA Director since 2009 - not sure why he still has a clearance or access.

Rice - Obama's National Security Adviser - why does she still have a clearance?
Brennan and Comey - I think transition time is long done for those two.

The issue is that it looks like he's doing it as retaliation for comments they made and not because they violated anything.

Honestly I think even at that level, it should be like with others. 2 years after leaving a federal government position you lose your clearance and definitely access. They shouldn't have clearances 9 years later like Hayden.

Your security clearance isn't terminated. It's still valid up to it's current expiration date. When I retired from the Army, my TS was still valid in JPAS for 3 more years and it's a bonus to be able to put that on resumes for jobs that require a security clearance. Once hired, the employer takes over responsibility of your clearance. If it expires before then, you start all over with your new government employer (especially contractor) and a long wait can jeopardize keeping that employment.

If you're trying to get a civilian job that requires a security clearance, it helps. For example, my TS didn't expire for another 3 years after I retired so 8 months job hunting, I got hired as a DOD contractor and processing me for a security clearance was much easier cause of my standing in JPAS. Three years later, new job that required an elevated clearance.
Just cause these former government officials still have a valid security clearance in the system doesn't mean they are using them in order to voice an opinion about this administration. The 'need to know' requirement is still enforced. Only an unethical buffoon leaks classified info to someone just cause that person has a valid clearance but doesn't even work in the organization.