Legislation must have a basis in philosophy

Legislation is not something that parliament can create at random. It must have a basis in philosophy, even if that is only the philosophy of the moment and current majority or dominant opinion.
If we have legislation for Equality, this is not a philosophy but merely a single fairly meaningless value.
A few populist values may be selected and paraded as a philosophy, while being nothing more than cynical political opportunism or naivety.
Instead of philosophy, the term end-value might better be used. Since ethical end-values are philosophies which need working up. [It requires some initial philosophical insight in order to identify end-values]
In a society that serves 'god' or the 'state' as a master, the question of equality does not arise. People will be treated according to the rule book, with equality a matter for pedants and not philosophy.
In society that is free from such tyranny, and in which 'god' is identified with ethical values, there are two essential end-values.
One is based on indulgence of the individual, with equality meaning anything that suits his desire, so long as it does not interfere with other egos. [In Australia women it seems can ply the 'trade' of prostitution in motels as of right. Women can now take part in Olympic boxing. Gays can marry.]
The other end value is that of people having the right to do all those things that benefit themselves and society treated holistically, according to their ideal nature. [This is more unlikely because it requires intelligent imagination. Is prostitution good for society, and does it degrade the sensibilities of those involved?]