How to increase the amount dropped by a zombie in line with player level?

[Parzival2020]

So I am working on a mod whereby the zombies only drop casinoCoins and you use those coins to purchase items from the trader.

I have the following in my loot.xml:

<remove
xpath="/lootcontainers/lootcontainer[@id='70']/item[@group='cannedfood'
or @name='drinkJarBeer'
or @name='drinkJarBoiledWater'
or @group='booksAllScaled'
or @group='brassResource'
or @name='resourceForgedIron'
or @name='resourceForgedSteel'
or @group='groupToolsTiered'
or @group='groupRareToolsTiered'
or @group='groupArmorScaled'
or @name='armorMiningHelmet'
or @group='groupApparelClothes'
or @group='warmClothes'
or @group='groupAmmoRegular'
or @group='groupWeaponsAllScaled'
or @name='apparelNightvisionGoggles'
or @name='oldCash'
or @name='drugHerbalAntibiotics'
or @group='rareMedicine'
or @name='drugPainkillers'
or @name='drugVitamins'
or @group='groupTreasureMaps'
or @group='groupQuestChallenge'
or @name='casinoCoin']

"/>

<!-- Bikers -->
<remove
xpath="/lootcontainers/lootcontainer[@id='71']/item[@group='cannedfood'
or @name='drinkJarBeer'
or @name='drinkJarBoiledWater'
or @group='booksAllScaled'
or @group='brassResource'
or @name='resourceForgedIron'
or @name='resourceForgedSteel'
or @group='groupToolsTiered'
or @group='groupRareToolsTiered'
or @group='groupArmorScaled'
or @name='armorMiningHelmet'
or @group='groupApparelClothes'
or @group='warmClothes'
or @group='groupAmmoRegular'
or @group='groupWeaponsAllScaled'
or @name='apparelNightvisionGoggles'
or @name='oldCash'
or @name='drugHerbalAntibiotics'
or @group='rareMedicine'
or @name='drugPainkillers'
or @name='drugVitamins'
or @group='groupTreasureMaps'
or @group='groupQuestChallenge'
or @name='resourceMilitaryFiber'
or @name='armorSwatHelmet'
or @group='groupApparelHazmat'
or @group='groupModAllScaled'
or @group='vehiclePartsTiered'
or @name='casinoCoin']

"/>

<!-- Demolitions Zombie -->
<remove xpath="/lootcontainers/lootcontainer[@id='73']/item[@group='booksRareOnlyScaled'
or @name='resourceForgedSteel'
or @group='groupRareToolsTiered'
or @group='groupArmorScaled'
or @name='armorSwatHelmet'
or @group='groupApparelHazmat'
or @group='groupAmmoRegular'
or @group='groupWeaponsAllScaled'
or @name='apparelNightvisionGoggles'
or @name='oldCash'
or @group='rareMedicine'
or @name='drugVitamins'
or @name='drugSteroids'
or @group='groupTreasureMaps'
or @group='groupQuestChallenge'
or @group='groupModAllScaled'
or @group='vehiclePartsTiered']

"/>

<!-- Add casinoCoin to Demolitions Zombie with low drop rate-->
<append xpath="/lootcontainers/lootcontainer[@id='73']">
<item name="casinoCoin" count="1,20" prob="1"/>
</append>

<!-- Add casinoCoin to Other Zombies with low drop rate-->
<append xpath="/lootcontainers/lootcontainer[@id='70']">
<item name="casinoCoin" count="1,20" prob="1"/>
</append>

<append xpath="/lootcontainers/lootcontainer[@id='71']">
<item name="casinoCoin" count="1,20" prob="1"/>
</append>




However it doesnt seem to matter what night or how high a level the player is the amount of coins never changes.

I would like it that the game progresses the zombies drop a higher value of coins.

Sorry if this is obvious this is my first attempt at modding