Maybe a few things need clarification:
Middle/Upper class - if you define that as those living in a household where the income is above 50K pesos a month, then many live in this class.
A teacher and a Policeluitenant living together can easily make that money. A small business owner (not home colmado) can easily make that money working with the entire family, a farmer of dairy cows can make it, a laywer can make it, even a good mechanic with his own shop, or a good builder with a small crew all can easily make that.
However, that income provides middle class only outside the big cities.
So as a large part of the population lives in the big cities, their expenses are much higher. This 50K budget might be defined as middle class, but will see them living in the poor house.
Middle/Upper class - if you define that as those living in a household where the income is above 50K pesos a month, then many live in this class.
A teacher and a Policeluitenant living together can easily make that money. A small business owner (not home colmado) can easily make that money working with the entire family, a farmer of dairy cows can make it, a laywer can make it, even a good mechanic with his own shop, or a good builder with a small crew all can easily make that.
However, that income provides middle class only outside the big cities.
So as a large part of the population lives in the big cities, their expenses are much higher. This 50K budget might be defined as middle class, but will see them living in the poor house.