I imagine a problem would be to determine exactly what the level of this salary would be... Enough for an apartment? single room? Food and Clothing? Or would the economy evolve to make the values of money such that you can just live from the basic income?

What stops people from wanting more and more making just sitting at home gaming more and more attractive?

What would I do? Start working the absolute minimum to keep my house, feed my kids and start something or my self? How many people would do that?