Why were Leopold I’s hereditary lands responsible for much of the cost of his wars?

The financial burden of the wars fought during the reign of Leopold I fell primarily upon his hereditary lands because the finances of these territories were poorly organized and lacked a sound basis.1

Although the empire provided some contributions and allies offered occasional subsidies, these sources were insufficient to cover the costs of his extensive military conflicts, which included struggles against the Turks and France. Leopold himself was noted to be careless regarding financial matters, and for many years, he allowed the treasury to be mismanaged by Count Sinzendorf.1