Allow residents to invest directly in the housing market with their 401K $$ instead of the usual 401K channels

Allow regular tax payers to be able to invest their 401K $$ directly into the housing market. Like a 401K they would pay taxes on the $$ only when they sell. This would provide another option besides the 'usual' 'managed' 401K investment options and would allow tax payers to feel directly responsible for the outcome of their investments.
It would of course also benefit the housing market.