It's actually very vague to compare the salary of a person in 2003 with that of 2021. Why you guys always forget the most important reason of increament i.e- Experience? If you really want to compare income growth, then compare the average salary of a fresher in a specific profession in 2003 & 2021 and lemme know if it has increased 4 times.
And please also enlighten me with the exponential growth in income of daily wagers.