When you are living outside of Pakistan , the income your earn is not subjected to taxation , that is same case in most countries.
However , you are still suppose to "Declare" that amount, and if a treaty exists between 2 nations that tax money is returned o the "Parent" country
In Pakistan , the problem is
a) They don't declare their foreign income while living in Pakistan and being in politics
b) They do not pay taxes while living inside Pakistan
The only solution to Pakistani Problem is
Taxation on all commodities (25-30% Tax)
a) Food , every time you buy groceries , you pay taxes, Phone , night party restaurant etc
b) Water
c) Utilities
d) Land , Property
e) Car ownership tax
f) Motor cycle ownership tax
g) Make up tax , clothes tax , TV tax , Cell phone tax
h) Taxi Tax , Rickshaw tax , illegal rickshaw should be collected and destroyed
Fixed 25%-30% tax collected
Exception: No Tax
Roti
Dal
Apple
School Fee
Businesses pay taxes as usual
Initially after the taxes are brought in there will be hardship , and people will complain , however in end the ones that work and pay the tax would have right to eat