Lou you are just really not getting it are you?
I don't know how it works for other companies, i just know what it would be like for myself and dp if someone did what the op want's to do to my dp.
Last year dp had a string of staff problems. A member of staff who had been there a long time left and so we advertised their job in the local paper. It took us 4-5 months to fill their job, going through 5 different people and i had to train every single one which i hate doing but don't have the choice. Plus at £50 a time to advertise the job isn't nice.
I trained someone up and then 2 days later they didn't bother to turn up again. Then i trained another who appeared to be good and then on the Monday morning dp phones me to say she has decided to go back up North so won't be coming back. My heart sank. Then another 2 came and left again. You get messed about so much with people when hiring it really does stress you out and get you down. I remember that being a really tough time for us in our household because when these people didn't turn up, or turned out not be very good, i had to cover meaning i had to also had to find child care at the same time. Dp and i were both stressed and worried the whole time, esspecially (sp?) as dp was coving someone himself who was off on SS at the time. I'm not trying to get anyone to feel sorry for us, i am just saying this is how it is for small employers.
Finding staff is a really tough job, finding good staff is even tougher. So if dp and i had thought yes, we have finally found someone good and then that person announces they are pregnant soon after they started, i can imagine how we would feel. Not only would be know we would have to find someone else when they go on maternity leave, it would be ten times harder because whoever we hired would have to be a temperory position because we have to keep the pregnant womans job open. Finding tempory staff is even harder than finding permanant staff, so then i would fear we would be going through staff, me repeating myself training people again AND all at £50 a time to advertise!
So if dp has been messed around by someone doing what the op wants to do then no, he isn't going to want to hire women of a certain age anymore. When you have been in the shoes of a small employer then you would understand why.