I don't get too upset about stuff associated with the Engineering institutions generally, but unfortunately, by using the term 'lower' institution and then saying no offence to technicians, ScottyUK has made me put pen to paper (metaphorically speaking). You will inevitably upset technicians by that remark, but hey, I'm not going make a thing about it, because frankly, I don't care enough anymore.
As an ex-technician, who has become a CEng through the mature/experiential route, I have experienced at first hand from the inside, the workings of some of these organisations and the EC (whatever they're now called) as well. You're right that this is all about league tables and being 'big' Institutions and finance. Survival of the fittest (biggest). The overheads associated with some of these organisations premises are astronomical and that's a very important factor for them.
I can't speak for the orgainsations mentioned specifically, but again, my experience is that these tend to be heavily populated by academics who simply don't understand the needs of industry.
The problem with mergers is that you can please all of the people some of the time and some of the people all of the time...
By the way, I sort of agree that standards have or may be falling, look at me - CEng with no degree. Outrageous. But to achieve IEng status, the requirements have become much more difficult. That will, I fear, inevitably have an impact on people taking up membership as well. The engineering education system is up the creek too. But that's another debate.
This is an interesting debate. I look forward to more comments.
At last we Brits have a debate on professional qualifications to rival some of the debates on the forum about P.E. status.