yes but the money you put into your pension didn't get taxed in the first place so of course when you draw you it now you pay tax. Now if you fancy drawing your pension now whilst also working of course it's classed as additional income and comes as taxed. If you hadn't put it into your pension back in the yonder years (presumably you were also paying tax then), then you have just differed when you decided to pay tax.
That's not even accounting for the 25% tax free pension you could take as a lump sum either (if you took it out when these rules were in place).
If you really wanted to, you could wait til you aren't working anymore and then your draw your pension to save on higher rate tax unless you have a **** load of investments and properties in which case it probably is right that you should be paying tax on your pension