Growth of an economy has to be measured not just in change in GBP. Other internal metrics to support the rise in GDP have lagged behind.
For example, mature laws, regulations, education and even cultural. There was a lot of FDI which helped the two decade long miracle growth, but it was not matched by strong domestic consumer demand.
The government took steps to tackle the rampant embezzlement of money because it made the wealth gap between rich and poor grow.