Well, why would those senior people want to apply and work at your company? This is not snark; this is a real question you need to be able to answer if you want

Well, why would those senior people want to apply and work at your company? This is not snark; this is a real question you need to be able to answer if you want a chance at hiring those senior people. Why would a senior person want to up and leave their position, which likely already pays pretty well, and treats them pretty well?