They own land! Give them money!

Excellent number crunching by Joe Sarling:

If a new Starter Home has a discounted value of £450,000 or less and [is bought by an] FTB is under the age of 40, all three policies (20% Starter Home discount; £3,000 government ISA bonus; 40% government loan) could be used in conjunction (Figure 1).

When this happens, the Government effectively funds 53% of the home.

For "government" read "taxpayer" of course, I find that helps to clarify things.