I understand the points above and am asking for a bit of lateral thinking. Going "Them's the (financial) rules" is what got us into this mess.
The finance industry fucked up massively by taking stupid gambles. We 'lent' them enormous amounts of money to save their system, which they fucked up. We're still pumping money in! The industry collectively defaulted on its promise to pay. As it happens, I fucked up far less and my home was repossessed. When I defaulted, the bank took back the property.
When banks repossess people's homes, they do not sell them and give the money back to us. They keep it and use it for more 'financial instruments'. They are not even facilitating loans to small business and home buyers, which were conditions of some the extra money we gave them. They renege on every deal we do with them, but we're not taking their property in lieu.
Meanwhile, we need homes. I don't think a largely moribund property portfolio is that much use to the banks. Its existence will not in any way relieve our ongoing crisis. A safely housed population is, however, less likely to make things worse than a homeless population co-existing with millions of empty homes.
If it makes things easier to understand, replace "Government" in my title with "Bank of England".