When England cannot provide there is no case for a Union
Whether Northern Ireland or Scotland realise this first is open to debate: it may be one or other by no more than a length in my opinion. Wales may be a few more lengths behind, but it will come in, albeit third. Whatever the ordering the reason for leaving the Union will be the same. The economic justification, which has always overcome the political and social reasons for separation, will have gone. And on that basis division if the Union becomes inevitable.
Can’t fault the argument myself. If England stops paying for everything then why should the Celts stick around as leeches? What would be the point?