They don't want SME's
The Govt don't want SME's.
Govt procurers love paying 3k a man day for Consultants. If you're a procurer, its in your best interest to handle contracts as large as possible.
The single only reason why there is an interest in SMEs is that the Govt think they're cheaper. And they are, only because procurers will not pay SME's what they will quite willingly pay to the 'big' consultancys.
Procurers are also completely risk averse - going with bigger, in their eyes, means going safer.
The great thing about Govt procurement is that the cash is never ending, you don't go bankrupt and you never get sacked.
Fantastic!