[Pyramid*]

It has it pros and cons.

Spare rooms could be used to generate some form of income for those unemployed or on low income.

Moving to a smaller property could free up housing for those who need larger properties but cannot obtain such because of those living in homes with rooms they do not need - which in turn will reduce the cost of heating a larger house with rooms that are not used - and saves the householder money.

Not an ideal solution for all by a long shot -but I can see advantages as well as disadvantages.