If the waste generated per GDP euro is compared to GDP per capita, then no trend is visible. Seems that required additional waste for additional euro per capita is more or less fixed (at least in Europe) except for 4 countries.
Math goes like this: to increase GDP per capita in 1 €, the total amount of waste should increase by w/(GDP per capita), where w is the current total amount of waste. Then the additional amount of waste is equal to (waste per GDP euro) * population.
What: Waste generated, tonnes per GDP euro & GDP, chain-linked volumes (2010), euro per capita
Where: European countries.