Why have all the different options of points when you can much easier just make them like the blocks? When you click them you can choice to go 1 quantity to 64 (1 stack), why not do the same with the Vouchers just maybe like 1 - 150000? That way you can more easily set a custom number of points you want to give to a player.
This can off course also be used for competitions where you win custom point awards like First: 1000, Second: 500 then Third: 250 ;)
I would totally want to give 1337 points to a random server friend just for the lolz :-)