What Mr Shapps forgets or isn't aware of (nor many Bankers in the recent past) is the Banking Cannons of Good Lending - You lend against the viability of the proposition not the security offered, which should only act as insurance.
The way in which this Government's policies have affected confidence in the financial world in respect of social housing means that lending regimes have been tightened up for the sector and the ability to use the value of housing stock which are tenanted to secure borrowing has had its confidence hit.
I am sure landlords do not want to put tenant's homes at risk with dodgy lending arrangements. However, it appears something that Mr Shapps would advocate.
Still we all are now aware of how he comes up with figures, he simply looks at how many followers he has on Twitter.