Paarsurrey, many people here have pointed out why the Buddha received alms, and his words on the subject. Scripture has been quoted, which you have not understood in context. And you have placed your own views upon Buddha, and denied that which he taught, because it goes against your views.
It is nearly impossible, for someone who accepts Abrahamic philosophy as their worldview, to understand dharma. Dharma cannot simply be read about and understood, it has to be lived in order to fully understand it. So to you, the Buddha receiving alms doesn't seem like a wise thing to do for a wise person. But you're not seeing what's going on. It's not those who receive alms who receive the most, the Buddha taught that those who give alms, who support the Sangha, receive great amounts of merit and wholesome karma. It's not done only to support the sangha, but for the benefit of those who give. When the Buddha received alms, he was not begging; in his great compassion, he was assisting those people who gave a chance at something greater. But there's even more to it than this. One of the primary teachings of Buddhism is non-attachment. When you give alms to the sangha, you're learning to not be attached to the things of the world, or what you might think is 'yours. So you not only gain merit, you gain wisdom from giving alms. It's not done for the sangha to be lazy, or whatever misperception you might have, it's a chance to teach and lead the people. It's a chance for them to attain something greater.