This is not a policy of the government, rather an order issued by DoPT dated July 1988 which has already been changed for exams such as IES in 2012. Age limit set to 32 years and attempts set to 6 is a policy of the government and I am not questioning it at all.
Secondly , this doesn't concern UPSC at all. UPSC has been tasked to function purely as an examination conducting body that recommends candidates to the government for posts notified by the latter. I am neither questioning nor challenging the process of a constitutional body. If you are referring to the EWS litigation that happened, I must inform you that the litigants challenged the dates set by UPSC i.e. 31st of July, and not by DoPT. I do not seek to do that.
I had a word with some officials of UPSC. Apparently, they just follow the orders of DoPT regarding such matters i.e. number of posts (railways posts redacted by DoPT recently), date of reckoning of age, etc.