At Economics.org.au, we put our reasoning front and centre. In brief, our argument is Gustave de Molinari's:
If there is one well-established truth in political economy, it is this:
That in all cases, for all commodities that serve to provide for the tangible or intangible needs of the consumer, it is in the consumer's best interest that labor and trade remain free, because the freedom of labor and of trade have as their necessary and permanent result the maximum reduction of price.