It took two years before Joseph was out of the prison that he wanted to be free from. Most of the time people do not think of the things of the world in light of scripture. Everyone knows that we have done wrong. If we know and love God, we know that when difficulty comes, we can trust that He has a plan and He is in control. Joseph made it very clear that what he knew was not from him. Sometimes God speaks to us and we just do not get it. Joseph's 20% tax would end up putting the Israelites. There will always be "A Pharoh that will not remember Joseph." God may not give us what we want, be He will always give us what we need.