Managing by committee is like choosing death by 1000 cuts. It is slow, painful and you wind up with a horrible end result.
Someone has to be ultimately responsible for the decisions. Someone must be held accountable. Committees are fine if they are advisory. But ultimately, all major decisions should have a single decision-maker.
This video provides more detail:
It is definitely lonely at the top. Using a management committee is a great way to inform good decisions but taking a vote and seeking consensus is a way to kill any initiative.
Be bold. Make informed decisions but do not play politics with the management committee process.