That's only really an option if you're just over the £100k threshold and not already contributing significant amounts to your pension.
I pay 10% of my salary into my pension, and considering that it's just another big casino (see what happened last week) then I'm not really comfortable paying any more into it. Certainly not by the amount by which I exceed the threshold.
It doesn't matter who you are or what you do, it's ridiculous to expect anyone to earn £6k and take home £200. We shouldn't be left to dream up ways to avoid it; it's our money, it isn't a gift - it's earnings, and it's already taxed at 41%.
It's up there with the rules on child benefit, TBH. A shameful legacy for whomever came up with the idea.