Is this possible?

I was thinking along the lines of the lua scripts for Payday 2, is it possible to create something not to simply give you credits but to adjust the bonuses for money and exp you receive in a match, i.e. make it think you hit more people and got way more money and exp that you did so you just receive a huge payout at the end of the match.

i dont know how to make hacks or anything just a possible suggestion

No, Still controlled server side.

No.
Maybe think of a way to gain more kills.
More kills = more money.