Proportionally each account forge with the same rate. No matter how coins it has.
But with PoS the rich do not get richer. No matter how much coin do you have, any one coin will always earn the same return. This is the most fair system you can ask for.
Come on it's math. Big stakes do accumulate way faster and therefore rich do get richer.
You don't understand.
Poor guy has 0.1% of all coins initially.
Rich guy has 10% of all coins initially.
Both are forging 24/7 for a year.
In the end of the year they still will have 0.1%/10% of all existing coins.