Housing and Planning Bill

My Lords, I have a simple question—this is not a speech—to ask the Minister. As far as I can see, the only effective constraint—apart from the price or value of the property—is the age of the applicant for a starter home, who has to be under 40. We all share a common wish to ensure that home ownership is available to people on modest incomes where it makes sense for their lives, but what about the displacement issue? In quite a number of cities where there are universities, colleges and so on, people do not expect to enter the home ownership market until they are around 30 or so—they are doing PhDs and so on—at which point they enjoy relatively generous salaries and could well afford first-time homes on the open market without taking any advantage of the discount. However, because the discount is there with no income-cap qualification to its retirement, we will see people who have quite generous incomes—and whose income increases will also be quite generous—able to pocket this public subsidy paid for by taxpayers, often with incomes much lower, and then trade up as soon as they get their first promotion. Why is the Minister not considering an income cap as well as an age cap to ensure that people who can buy without discount should?