What do you mean who? There are just less coins generated now. That is the whole point - the N factor slows the coin mining encouraging trading and spending of the coin rather than mining and piling up coins
I mean that every 32 seconds the network discovers a block which costs roughly 155000.
On average, everybody gets their share in the same proportion as their speed divided by network hash rate.
For example, lets say yesterday network hash rate was 1 GHs and my hash rate was 1 Mhs.
That means that on average I was getting 155000/1000=155 MRC every 32 seconds.
Lets say today network hashrate is 450MHs.
Guess how much coins would I earn if my hash rate dropped to 450 KHs?
If I'm getting 70 MRC instead of 155 - that means that my hashrate in proportion to the network is not 1/1000 anymore.
Which means that somebody else had managed to get their speed higher.