Why did the old monk of Sanguan Temple in Bailuyuan beg for alms?

When Sakyamuni initiated the Sangha system, it was stipulated that monks should not store private property when they became monks, and all expenses should be begged from the world to break the hierarchical concept. Even if you are a prince, as long as you become a monk, you will experience human suffering from the bottom like a beggar. This is called charity, so with the development of Buddhism, this original intention was abandoned, but monks regard charity as a part of their practice and keep it forever, regardless of temple property or not. The temple still relies on charity to solve all its financial problems. Monks in Sanguan Temple behave like joint-stock companies now. Temple property is equivalent to the boss's private savings. No matter whether the company closes down or the funds are broken, the boss generally won't use his savings to solve the problem. Public and private are separated, why can sellers solve the problem?