If the leader is not just and can not give the muslims their rights, then he will not be able to collect the taxes and spend them correctly and implement the punishments. From the book "Islamic leadership"

IslamsLjus.se

The Lantern of Truth

ImamAli.se

The master(A) of belivers

MinHijab.nu

Part of our religion and identity

ImamMahdi.se

The Awaited(Aj)

Dagsbladet.se

An alternativ voice

Profeten.nu

God's beloved

FatimaZahra.se

Mistress(A) of the woman of the world

Karbala.se

Eternal message

IslamPortalen.se

The princips of beliefs

Duaa.se

Divine invocations

Sunnah.se

Authentic hadiths

ImamHassan.se

Establisher of Ashura

Azan.se

Speeches in swedish

Islamopedia.se

Aqa'id, Fiqh, question & answer

DvvUng.se

Children & youth

DVV Books Read In the name of thy Lord

Inspiration