Answer:
Eventually no matter how much consumer needs a certain good or service, if a monopolist charges too much for it, the demand will start to fall, e.g. if Microsoft would start charging $2,000 for Windows licenses, eventually consumers would ditch Windows and switch to other operating systems.
Even if a monopolist is able to perfectly price discriminate, at some point consumers will no longer be able or willing to pay. No matter how much bargaining power a monopolist holds, consumers' income will always limit the maximum price.