Unless there is a big, big difference in wages I don't see why anyone would ever take private sector over government work in their 20s. In my industry my choice was work 60 hours a week for $55k a year or work 40 hours a week for $40k a year when I was fresh out of college. Plus a big difference in allocated holiday days.
The difference in free time allows you to stay in good shape, maintain your friendships, develop yourself intellectually, go on dates during the work week and travel the world. And you shouldn't need the extra cash in your 20s anyway - you don't need the nice BMW or the penthouse at that age, it's still socially acceptable to be somewhat studenty.
If after a couple years your career isn't moving fast enough (as it likely won't be) for your liking, and you want both promotions and money, then you can always switch to private sector once youre 30+. You'll probably be 2/3 years behind someone who went in at 25 years old but you'll have a hell of a lot more (and better) life experience.
The difference in free time allows you to stay in good shape, maintain your friendships, develop yourself intellectually, go on dates during the work week and travel the world. And you shouldn't need the extra cash in your 20s anyway - you don't need the nice BMW or the penthouse at that age, it's still socially acceptable to be somewhat studenty.
If after a couple years your career isn't moving fast enough (as it likely won't be) for your liking, and you want both promotions and money, then you can always switch to private sector once youre 30+. You'll probably be 2/3 years behind someone who went in at 25 years old but you'll have a hell of a lot more (and better) life experience.