Islam bans stock markets and interest (though not all current so-called muslim countries) and every person who is rich (who have more than 87 grams of gold worth of things) is obliged to donate %2.5 of their total wealth to the poor every year. In Muslim countries, the state collects and distributes this, so it's effectively a tax. Necessities of life (shelter etc.) are excluded from total value calculation. Muslim countries traditionally took away land of people who didn't utilize it for 3 consecutive years, though idk whether this is rooted in the religion itself.
