They were told so
Many people told those in charge it would be an expensive disaster.
The government did its usual - opened to 'competative tender' but set the rules such that only a very small number of huge and very expensive international consultancies could even bid, it then chose one of them and gave them a stack load of money, a very very small proportion of this money was spent on a bunch of Indian developers, a massive amount was siphoned off into massive wages and bonuses for 2 or 3 individuals 'at the top'.
It was never going to deliver. And the 'new idea' will also end up with similar restrictions so that services won't come from small or medium British companies but again from huge global consultancies who will once again outsource to India. This is the way UK government procurement works - for everything - set the rules to ensure that NO British company can ever be involved, then bemoan the 20+% unemployment and pretend they are 'trying' to do something about the shrinkage that has occured every year since I was born in the number of jobs, the wages and prospects for workers in this country. [I, with a degree my father never had, working in what was supposed to be a 'growth industry' (computers) and successful at my job have a lower standard of living than my father has ever had]