Background: Magnates often received gifts from monarchs, which significantly increased their wealth. Often, those gifts were only temporary leases, which the magnates never returned (in the 16th century, the anti-magnate opposition among szlachta was known as the ruch egzekucji praw—movement for execution of the laws—which demanded that all such possessions are returned to their proper owner, the king).
Question: What significantly increased the magnates wealth?
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