Your premise is faulty. The questions investigated by philosophy are sometimes answered (although it can take many centuries of work). However, when an answer is arrived it, the issue in question ceases to be part of philosophy. It may become common sense, or it may become part of the conceptual foundations of a science. It is a historical illusion that the problems of philosophy are never solved, brought about by the fact that once a problem is solved (or understood well enough that the more detailed and systematic sort of methodologies that we call scientific research can fruitfully be applied to it), it ceases to be part of philosophy, and philosophy carries on with the problems that have not been solved yet. Maybe one day, more of them will be solved, but they are very difficult questions, so it may take a long time. To do worthwhile philosophy requires patience and a very high tolerance for frustration. The timeframes for philosophical research tend to be very long, but history has shown that the potential payoffs can be huge. If you can read this on your computer screen today, than k a philosopher (or rather, thank the many thousands of philosophers, long dead, who made modern science possible.)
The word “philosophy” comes from the Greek meaning “love of knowledge” (“knowledge” really gets closer to the original sense than “wisdom”), and the earliest philosophers were interested in knowing about all sorts of things, including many issues, such as the causes of natural phenomena, the structure of the universe and what it is made of, and the origins of life, that are now considered matters for science. However, it took about 2,000 years of philosophical worrying away at these problems before the understanding of the issues reached the stage at which they became recognizably scientific as opposed to philosophical questions. These days, we no longer call the people who work on these problems “philosophers” (300 years ago, that was what they were called) and their research requires different (and usually much more expensive) equipment.
Personally, however, I would not be surprised if the mind-body problem were solved, to the extent where it can safely be handed over entirely to the scientists, within the next 50 to 100 years. (Of course, that is just an educated guess, and may be quite wrong. Some people think they have solved the problem already, but that is because they do not understand what it is to have solved such a problem. On the other hand, there are others who can make a strong case that it can never be solved.)
Other problems, such as the nature of right and wrong, may well take a lot longer, and it is conceivable that they are truly insoluble. But maybe not, and the payoff of really knowing could, once again, be huge. Just don’t hold your breath (or even expect it to be within your lifetime).