I would have thought the plumber should have asked what the pump was supplying to whoever instructed him to do the job. I assume you are the builder? If so, you should have made sure what the job needed exactly was, which would normally require the plumber and customer to also communicate directly to each other. If it was straightforward to keep basin and particularly the toilet not pumped, or on a repipe job, then they should have been separate IMO. Pumps are just being overused, shortening their lifespan every time a basin tap is opened or a loo flushed, not to forget the noise nuisance.
I know I wouldn't fit a pump to anything that didn't require it unless with specific instructions from customer and I would consider and advise on existing taps or new tap choice.