Congestion Charge V Parking Costs

[5STM5]

I've been having a look at this and it appears that despite the congestion charge, cost of parking is unaffected by this. Long term parking costs within the Congestion Zone are £250 p/m upwards, but the really high costs are where they are expected to be. Outside the CZ e.g. Shoreditch are £250 p/m and upwards.
Does the Congestion Charge really come in to play?