Doug the Head,
Binsleepen seemed to be merely pointing out the Catch-22 that he has too much experience to be considered for the only method of getting into the RHS and does not have the type-rating to be considered for a DEC. His options are consequently limited and he may well have to pay for a type-rating and be prepared to work for low pay in order to improve his prospects.
I find it quite wrong that you are accusing anyone who considers taking a DEC position as 'stabbing senior FOs in the back'. Why should an unemployed pilot have a an obligation to worry about someone else's career prospects? That responsibility lays firmly at the feet of the company's existing pilot workforce and company council. The rise of the lo-co in the 1990's undermined the business of the legacy airlines and affected the job security, prospects and conditions of their existing pilots. Was that a concern of yours when you decided to work for a lo-co? Of course not; you have no obligation those guys just as the potential DEC has no obligation to you. If a company chooses to hire DECs rather than promote from within, it is a tacit statement that their own FOs are not experienced enough or the company does not want to bear the cost/risk of upgrading them.
It is up to the pilots within a company to protect the terms and conditions of the workforce, including those of the the new-joiners. If there are promotable SFOs and the existing workforce is not willing to say no to the company hiring DECs, then you can hardly expect people external to the company to show any greater concern. The irony is that you accuse binsleepen of thinking he has a right to a job, when your attitude toward command seems to be cut from the same cloth.