Can a charity trust exist forever (well as close as physics allows.. the Sun can always go out)?

If you create a charity trust, then the trust pays out but only 2% of funds. The wealth, which funds the trust, would continue to grow; and in theory, the trust can survive forever. In practice, is this true? Would the entity come to a legal end? Would the government sweep in and eventually take the money? Would a corrupt individual eventually come in and steal it?