No, it's not fear that's why Russian government pays to Chechnya 1 billion rubles per day, overall Chechnya gets more than 370+ billion of rubles per year from Russian budget. Same story with every other republic inside of Russian federation - they all are getting paid in exchange for loyalty, as for other regions Putin installs Muppet governors there, he let them rule, let them to get rich and richer, on their turn they install mayors of the cities across the region and that's how the whole country is being controlled, full vertical of power. politicians, military, police - it all merged into one bottle of corruption, nepotism and embezzlement.