Trashpile Loots not spawning even when loot is set to 1000 to spawn.

As state in tittle. I find that trashpile and wreck truck loots is getting rare even when I enforce spawn of 1000 with Entity Reducer.

Is it possible to specify which loots I can reduce?

All Populations are in the config.
Cannot be specified if not in the config.
After you modify the config, run the "er.fillpopulations" command to fill the population.