Why might rulers of command and socialists economies fear mixing elements of market and capitalist economies?

Rulers of command and socialist economies may fear mixing elements of market and capitalist economies because it could undermine their control over the economy and lead to increased inequality. Introducing market mechanisms can empower individuals and private enterprises, which may challenge the state's authority and shift power dynamics. Additionally, it could result in a loss of ideological cohesion, as the principles of capitalism may conflict with socialist values. This blend might also provoke social unrest if disparities emerge, threatening the stability of the regime.