Pay for them in what way?? Our present policy is directed to keeping them out. Measures to ensure that cost a lot of money. If we want that to happen, we’d jolly well better share the cost of it with France, hadn’t we?
If on the other hand what you meant was, should the fifth largest economy in the world provide the resources necessary at least to help this handful of desperate people have their applications processed quickly and with humanity, or should we just leave them sleeping in woods in winter while French riot police spray teargas on their sleeping bags every night, until local charities run out of the resources to keep replacing them, then the latter. Obviously.