campaigners are urging the Scottish Government to scrap the right to buy for council and housing association tenants.
The charity Shelter Scotland said doing this will encourage local authorities to invest more in social housing.
With 156,000 households on the waiting list for a council property, 10,000 new social houses are needed a year to meet current demand, Shelter Scotland believes.
But in the last decade 92,000 council properties have been sold to tenants at discounted prices through right-to-buy, according to the charity.
Since the entitlement was established during Margaret Thatcher's rule, about 455,000 former council homes have been sold off.
The Scottish Government is now consulting on reforming the policy, with the option of scrapping the right-to-buy being considered.
In its response to the consultation, Shelter Scotland said right- to-buy should be abolished. Failing that, it would only support reform of the policy if discounts to tenants were reduced and people had to wait longer to be eligible to buy their home.
Shelter Scotland director Graeme Brown said: "Right-to-buy has greatly benefited many thousands of former council tenants. But the good fortune of a few has come at the cost of many more people having to sit on council waiting lists for months and years.
"Our preferred option is to scrap right-to- buy. The policy has no place in today's housing system where demand for social homes continues to outstrip supply.
"We estimate 10,000 new homes a year need to be built.
"By protecting existing and future council-house stock, local authorities will be much more inclined to invest in a social housing system that meets current and future demand in Scotland."