Kindness pays

"Even if it were not to have paid" is more correct, but less colloquial.

They did get paid tho, $150 is not very less.

150 dollars is quite a bit less than $1,500

It is, but by itself, it's $1500 and stealing from someone the money actually belongs to, and $150 earned by helping someone and not being selfish. It depends on how strong your moral values are.