The character of a leader and his attitude toward wealth directly determine the stability of his government and the span of his life. Power presents a constant temptation, and how a ruler handles money ultimately reveals his wisdom.
The primary approach among commentators contrasts two distinct types of rule. A leader who lacks understanding naturally turns to heavy oppression. Driven by foolishness, he continuously robs and exploits his subjects to hoard wealth, failing to realize that such cruelty actually undermines his authority and shortens his reign [רש״י, מצודת דוד, ביאור שטיינזלץ]. The crushed citizens suffer deeply under his control, a dynamic that often sparks a rebellion capable of toppling the regime entirely, much like animals fleeing in terror from a roaring lion [רלב״ג]. Conversely, the ideal leader despises dishonest gain. By guiding his people with integrity, he secures a long and peaceful rule over his kingdom [רש״י, רלב״ג, עמנואל הרומי].
A different perspective views these contrasting traits as existing within a single, complex ruler. A leader might be foolish and highly oppressive, operating under the mistaken belief that his elevated status grants him the right to exploit the public. Yet, if he possesses just one redeeming quality—a deep hatred for dishonest gain, demonstrated by refusing bribes and ensuring fair justice in daily disputes between citizens—this single merit is enough to grant him a long life. This interpretation highlights the profound destruction caused by bribery, showing that strictly avoiding it has the power to compensate for otherwise severe failures in leadership [אלשיך, עמנואל הרומי].
Taking a completely unique angle, another interpretation shifts the focus away from the leader and onto the ordinary citizen living under a corrupt regime. When a wicked ruler is also foolish, he acts without any foresight. Rather than allowing merchants to prosper so he can collect taxes over time, he hastily executes anyone with wealth just to seize their property. In such a brutal and short-sighted society, the only person who manages to survive and live a long life is the citizen who shuns wealth altogether. By actively avoiding the accumulation of money, this individual appears poor and insignificant to the greedy ruler, successfully escaping the danger of death [מלבי״ם].