At the start of NEM, they just get 5% but you will get 45%(if you will put 45m to you).
45m is less than 5% of the total 1 billion.
Mining has no relationship with proof of stake.
If you want more stake, then I suggest that you exchange Nxt for NEX.
A lot of people will complain if more stake is given to people who did not pay in. So there is a balance that needs to be preserved.
Carlos, we all know that you are completely mad at Nxt due to your envy illness and you've been going on and on spreading misinformation. It is probably hard for you to face that your NEX babbling project is essentially set to an end since NEM is basically what you had hoped to achieve. It is backed by a large enthusiastic community and an actual development team. You failed, you are out already. Carry on man.