I think managing money doesnt fully dependent on salary,because if you have habits like gambling or drinking then you cant even manage high salary and one can manage small salaries as well if he spend carefully.
Yeah, main thing is carefully spending, than we can manage our money. Otherwise i also agree on it, that it is really difficult to manege it only on salary.
Actually our extra expenses always create problems for us, like our smoking, credit cards and as you said gambling and drinking, but if we control all extra expenses than i think we can manege it our home with our salary.