You missed the point. With this ridiculously amount of Tax, investors will not invest in Pakistan. Even local investors will move their money outside. Influential rich in Pakistan ( like politicians) will evade Tax just like they have been with the help of those that supposed to implement it. There is no long arm of the law in Pakistan for the rich. Everyday, millions of dollars worth of stuff is imported for the rich Tax free. Hire right people (ex-govt officers), who than use their contacts to bribe and release stuff.If I understand correctly, the tax is only on the very rich. You are right that higher taxes lead to evasion, but with technology and so many linkages and identification numbers, it is rather difficult to escape the long arm of the law, i.e. if the government is really serious about it. New (higher) tax bracket on the rich is an indication that the government has run out of options. If inspite of this they choose to allow rampant evasion by the rich (who should already be in the tax net), it is very unfortunate.
Everyone should pay their equal fair share of Taxes. Same %, Not more or less. Exception should be dirt poor folks.