The way I look at it is this. I'm paying my workers to do a job for me. If circumstances change I might have to reduce their pay and change some work practices to economise. I may even have to let some go. It happens all the time in real life businesses small and large. If they go on strike and refuse to do the job I pay them to do then I'll have to sack them and find someone else who will.
Further, if I have already contributed more than once, out of the goodness of my heart, to another fund for which I have no liability and they come along a while later with, "Please, Sir, I want some more" or they'll strike I'll just tell them to sod off. I certainly won't be handing them an envelope with a Hundred Grand in it.