So is food. Should we get a tax credit for buying certain kinds of food?
But this is where we disagree - a tax credit prompted you to buy a home? Do we really need such misaligned incentives in our income tax policy? I would submit that we don't - and that by having such incentives we distort the market for other goods and services you could have bought instead (but refrained from buying because the tax incentive prompted you to buy a home.)
I was paying 800 a month rent....We got our notice of rent increase to 850...so we sat down and figured out what we can afford to buy where our nmortgage payments were 850 a month or less....the answer was "very little"....until my friend who was an accountant told me that the interest is deductable...and we sat dopwn and did the math....and found we could afford a home in the 150K range....
So we bought a home.
And the difference between your examples of food products and homes...
Food products may be a basis of our economy, but all of the alternatives are equal....so purchasing..say tomoatos does no more for our economy if it were incentivized to buy over the nmormal purchase of apples.
Renting does little for our economy....home construction does massive amounts for our economy.
I personally see it as something that works and is available to everyone.....the reason it is not available to those with second homes? Becuase very few can ever afford a second home and THAT would be a special interest group.