Right now,any stimulates that goes to production side,instead of consumption side,will not work.
Not really, China's priority is to resolve the debt crisis of the property sector and the local government debt. China needs to avoid liquidity trap and credit freeze which is lot more important than reviving the consumption. Both property sector and the local government employed many people. Keeping these people employed and ensured property developers repaid their debt would increase consumption. Making sure property developers completed their housing projects and delivered the apartment on time would also help consumption as new home owner usually spend a lot of money on big ticket items.
For consumption, the government needs to refinance all mortgage to lower the cost of mortgage payment and alleviate the debt burden of most Chinese household. Most Chinese people don't have debt problem except the mortgage that is why it is so important to cut the cost of mortgage payment.
As for wealth concentration, it is not the main reason why consumption is down. Consumption is down due to the fact that average people are uncertain of the direction of the economy and feel less confident. Both weak housing prices and stock market have become a drag of consumption. If the housing prices and stock prices have increased, people would spend more money and consumption would go up.