The post you are reporting:
The idea of 'costing' is yet another red herring.
If you travel by train on a Family Rail ticket, your children will each occupy a seat at well below the price that an adult would pay if they bought a ticket to travel 'on the day'.
Would it be reasonable then to chide the Rail Company for offering Family Rail tickets?
No doubt railway companies take this point into consideration and limit the availability of such cheap-travel to off-peak services.
It may be desirable to coax those people who have made a home for themselves and their brood to consider down-sizing as their offspring fly the nest in order to make way for the next generation of home-making tenants. (Just as there would have been pressure from these same tenants to up-size as their family grew.)
However, this is the UK, and it is inescapable that, no matter who is in Government, the affairs of the population are organised in a sternly patriarchal fashion. We are each inculcated into the habit of 'looking up' for guidance and support;not just in terms of welfare, but also in many other ways where Government action seems counter intuitive - but is explained away, from on-high, as being in the country's best interest:HS2, Trident replacement, privatisation of National assets etc.
How can it be, that the problems that beset the provision of suitable housing can solely or mainly be laid upon the home-maker?
Generally speaking, two half-pints of milk are priced higher than one pint. If a supplier of milk, for whatever reason, has his shop filled with half-pint bottles:How long would he stay in business if he were not to sell two such bottles for the same price as a one pint bottle?
What sense would it make for him to pass the onus for his own error onto his 'loyal' customer?