But the reason it is far too low red, is because it protects a whole range of vested interests. Build enough housing (and you lower the profits of construction firms , BTL landlords. You lower the asset value of many voters, so they don't vote for you, and hugely you lower the asset value of those who donate money to parties. Too many vested interests in one market to actually do anything about it.
Further issues with the cutting benefits to cut the deficit are that people are buying into what is in effect cod economics, because it suits their own prejudices (lazy feckless scroungers, why should I pay etc etc). In effect deficit reduction, the deficit which rose year on year last month btw, is being used as an excuse to sell off former public assets to private interests. In effect it is very in line with the Chicago School ideas that you need a external or internal shock in order to be able to bring free market economics to former public industries. Unfortunately the "free market" in many cases actually means selling off to crony capitalists to the detriment of the consumer and the nation selling.
Watch what happens with the NHS, Education and such over the next few years, funding cuts will cause them to under perform and be sold off to the private sector, it won't be any better, but the vested interests of those at the top ( as with housing) will have been sated.
Deficit is not really an issue, neither is debt because countries do not work like households ( another part of the myth sold on the "paying down the nations credit card" ugh! ). Do you know when we paid the last installment on the debt accrued during the 1st world war? Last year. We paid the last installment on an American post war 2nd world war loan in 2006, its not an "issue" really.
If deficit was really an issue, we would be chasing more of the £116 bn per year avoided/evaded in corporation tax, plus shutting down non-dom status, and raising things like corporation tax. We would also be cutting corporate subsidies, subsidies to land owners and a wealth of extra measures.
The major problem with the benefits debate is the "aspirational" attitude towards taxation of many voters, they vote for things like lower inheritance tax rates and upper income tax rates because they think they wouldn't like it when they get there, very few do something like 9% of the population will benefit from the inheritance tax raise, yet the nation loses billions a year, almost as much as the cut in work tax credits is going to cost, funny that..
Finally I can use this inheritance on houses point to finish, the raise in house prices is not based upon the "hard work" or effort of those who bought them, but the society around them improving, many who bought prior to 2000 have benefited hugely from government policies and need to put back into the society from which those benefits arose.
The wealth of those who gain most from the slashing of corporation tax, capital gains etc, is not based on "hard work" but on the receipt of rentier money ( dividends, rent, etc) and should be taxed accordingly. We are in a sorry state of affairs when we tax earnings by far more than wealth which means that inequality and the need for things like benefits rises because of that inequality, privilege entrenches, and the dream of hard work equaling success dwindles for all but the very few.
Sorry, rant over, hope I don't come across as a loony.