bus conductors, traffic wardens, stray dog officers, security staff, park staff and ticket inspectors in no way have creative control over their work.. they're given a restricted ability to refuse service or remove a person/people/things from a property or area. that's different from the creative discipline which teachers are able to employ, police, prison officers, and yes lots of welfare staff (including housing officers, who are actively involved in evictions) too.
there are some loose ends - but tbh i don't think it's too important. the other point to make is that it shouldn't be necessary to come up with a definition of class that accounts for the personal conditions and situations of every employed person in existence, so much as a definition which outlines general principles and links them to a structural analysis. i do happen to think that the present left, generally, casts the net too wide in claiming people for the 'working class' (based more upon an opportunistic grasp for organised and unionised sections of the workforce rather than any structural understanding of their social role in relation to capitalism). ironically, they do this at the same time as excluding many genuine working class people from their political horizons on account of their non-kosher attitudes and behaviours. and, also, essentially ignoring the majority of working class people by spending so much time obsessing about the 7% who are organised into TUs.