System Thinking Vs Six Sigma

One of the key criticisms of Six sigma by systems thinkers is that six sigma does not challenge the way managers think, it designed to appeal to command and control managers and allows managers to maintain the status quo. Whereas systems thinking suggests that organisation sshould change current thinking and practices and instead of focussing on improving the 5% of problems the people they should focus on the 95% the work.

I would be interested to know if people see this as a genuine criticism of six sigma or does six sigma enable a change in management thinking- a move away from command and control?