In any future war with India PAF will be only in air for first hour because of this fighter mafia,no doubt Pakistani economy is in bad shape but still government can provide if Army asks again and again,here is case which i copied from Wikipedia
"After the
Pressler amendment was passed, the U.S. placed sanctions and an arms embargo on Pakistan on 6 October 1990 due to the country's continued nuclear weapons programme. All eleven
Peace Gate III F-16s, along with 7 F-16A and 10 F-16B of the 60
Peace Gate IV F-16s, which had been built by the end of 1994 were embargoed and put into storage in the United States.
Desperate for a new high-tech combat aircraft, between late 1990 and 1993 the PAF evaluated the European
Panavia Tornado MRCA (multi-role combat aircraft) and rejected it. The
Mirage 2000E and an offer from Poland for the supply of
MiG-29 and
Su-27 were also considered but nothing materialised. In 1992 the PAF again looked at the
Mirage 2000, reviving a proposal from the early 1980s to procure around 20-40 aircraft, but again a sale did not occur because France did not want to sell a fully capable version due to political reasons. In August 1994 the PAF was offered the
Saab JAS-39 Gripen by Sweden, but again the sale did not occur because 20% of the Gripen's components were from the U.S. and Pakistan was still under U.S. sanctions.
In mid-1992 Pakistan was close to signing a contract for the supply of 40
Dassault Mirage 2000, equipped with Thomson-CSF RDM/7 radars, from France.
In mid-1994 it was reported that the Russian manufacturers Sukhoi and Mikoyan were offering the Su-27 and MiG-29. But Pakistan was later reported to be negotiating for supply of the
Dassault Mirage 2000-5. French and Russian teams visited Pakistan on 27 November 1994 and it was speculated that interest in the Russian aircraft was to pressure France into reducing the price of the Mirage 2000. Stated requirement was for up to 40 aircraft."
As you see in above case at that time Pakistani economy was good enough and Russians were in dire need of money in 1994 only PAF has got some personal who get kickbacks from west.Actually PAF was not even willing for JFT project government forced them to do so..No boyz today Russia is in dire need on money if Pakistan can arrange funds thy will sell you if not huge funds it will be okay to have a su-35 engine in JFT frame,it will be a huge blow with that if PAF designs JFT into F-16xl type strike fighter,