M2h = 2mW + rGcca
It is understood this federal treasury formula accepts that mortgages are too high—ensuring that two must work, plus also receive government child care allowances.
The formula replaced the following post-war equation, which became obsolete in 1973:-
MOK = mW + 0(rGcca)
Or, mortgage OK = one must work, plus receive zero government child care allowances.
Treasury is believed to occasionally assess the difference between the two equations to measure the vast growth in the private capture of publicly-generated land rent.