The question is whether your wife is still working and earning. ??
There is not much difference in both of urs salary.....Looking at the facts she does not need any maintenance and can take care of her needs. Physiotherapist is a profession in demand, she can work as a freelancer or with an hospital and easily earn more than min 10-15k pm.
Since you are jobless now the court cannot ask you to pay 25kpm unless ur wife proves in court that u r still employed /have other sources of income. You should deny giving her any maintenance as she is qualified and capable to earn. Your wife should first make out a case of maintenance in which she has to prove why she left her job / what effort has she done to get a job or she has wilfully left job to claim free money from husband.
There are several judgements which u can read on the net and thru a competent lawyer work towards denying maintenance to ur wife. However if you have kids then you have to contribute for their maintenance.