I'd focus less on what expatriate Pakistanis think and more on why we have expatriate Pakistanis to begin with.
It's one thing if Pakistanis were working or studying abroad temporarily with the aim to return home. But why is it that we have a growing dual-national population? Simply put, it's because our government establishment in Pakistan is so bad at its job (we're beyond corruption at this point), that we have people who'd rather live a substandard life in the West than be a son of a soil.
That's the actual problem.
Moreover, I wouldn't make it a 'expatriate vs local Pakistani' thing either. Ultimately, everyone except for the very wealthy in Pakistan wants to leave the country. The fact that OP started this thread tells us that the question's on his mind. Your average Canadian, American, British, French, etc would never ask themselves that question, much less consider it.
To be frank, unless those with power and influence fix Pakistan, our country's going to slowly sink. I'm not going to say "WE" should change it because, to be honest, we can't. We just can't. Our nation's vote doesn't get us anywhere. Our complaining doesn't move a needle. What's left? It's those who dabble in the DHAs, the corruption, and the wider clown show. They need to grow up and give a damn. Yet they too are looking to leave Pakistan (look at how many of their kids live abroad).
Our country isn't ruled by those who truly love it and, as a result, we're all paying the price.