So is Ayub Khan. So is Jinnah. Pakistan also changed its constitution and went through several overthrow of governments.
The difference is Iran did help Pakistan in its wars. But when Iran was attacked by Saddam in 1980, Pakistan stood by and watched. So much so for backstabbing.
Also let's not forget, that in Pakistan, since 1980's Shias have been targeted and killed in mass which is continuing till date.
Another point to mention, is the very fact that Saudis pushed for and eventually made India, a permanent observer member of Arab League. Pakistan was denied the same by Saudis and other Arabs.
India continued to buy Iranian oil even if it had to pay for it in rice, but Pakistan refused to connect to a gas pipeline which Iran built for the purpose.
At any rate, if you shall and must sell your services, then please, as a brotherly advise do so with proper payment.
If you want to be part of this quagmire for the next three years for instance, do so for a price tag of 300 billion dollars cash payment, which Saudis can easily afford with their 800 billion dollar foreign currency reserve. At least this way, you can improve conditions in your country.
Do not offer yourself for a couple of billion. Not really worth it.