This is a difficult one but I think that some jobs are different.
Some jobs have some responsiblity so a Police Officer with a criminal record is not really on. A teacher also would be a concern, although whilst a padeophile would not be acceptable, somebody who shoplifted whilst under stress could possibly be rehabiliated. However any teacher with a criminal record trying to control a class of kids is on a hiding to nothing.
Other jobs are very high profile and indeed almost a privilege. Entertainment in general is that sort of a job.
Gary Glitter isn't going to be allowed to do a 70's retro show!
Stuart Hall has already been mentioned.
Although you can argue the point, sport isn't just a job. We can argue whether they really are role models or not but having a crowd of 30-80,000 cheering on a rapist doesn't feel right. Also the fact is that any rehabilitated person needs to avoid being put in a situation where they are likely to reoffend. Footballers get a lot of female interest and the chances of him being in a situation where he could do something similar again are high.
So the base situation that an offendor needs to be allowed to return to work is basically right but that doesn't necessarily mean any job they want.
Murder, rape, paedophilia are definitely going to have some restrictions, Fully rehabilitating these sort of offendors is almost impossible anyway. They have gone so far beyond an acceptable level of behaviour that is very difficult to be sure somebody won't do that again and can be persuaded it was wrong. Theft is something that you can hope to persuade somebody that it is wrong and they will reform. Sometimes they just don't understand the impact on others. With the first three crimes, the impact on others is clear at the time of the time and if the perpertrator can't see that, it is difficult to see how you reform them.
In this case, either Ched Evans really is innocent and can overturn the conviction or he is guilty and just can't see what he did is wrong. Which means he hasn't reformed at all, is still a danger and shouldn't be in allowed to play. They need to find him an office job. Actually if Sheffield United made him groundsman then that could be acceptable.
It's not double standards as such. It is just that some occupations aren't acceptable for an ex-con particularly for those guilty of serious crimes. If he got a job as PE teacher at your daughter's sixth form college i am sure you would have an issue with that. That of course wouldn't happen as he is on the sex offendors' register. Thinking about it, even if he did come back as a player he wouldn't be allowed to do everything e.g. outreach sessions going into local schools which a lot of clubs do.
Simon, Yes that fast (my PB was there). That was indeed taken off us when Cranfield withdrew permission and the Cranfield 5 mile as well. Actually on the latter the county is finally replacing that next year but as a 10k in Bedford.