Who said anything about being evil?
The wealthy could now have 100s of 1000s in ISAs, tax free, without a single penny being required to be invested in the UK, with the tax payer funding this.
Its very quick and easy, as a couple, to have a large amount of money invested - 40k per year - and not pay any tax on gains.
When they were introduced, the spilt was 3k cash 7k invested, back then, investing in the uk was common, far less so now.