Turning into IPL might solve financial problems but playing for India remains a dream for everyone, that's why the majority of them keep doing hard yards in the domestic circuit for years.
Money > Dreams for most people which is why those hard workers would instantly shift to leagues like the IPL if they got an opportunity.
There is a reason that now BCCI is doubling down on players to focus on domestic cricket, they even signalled capped players that if they are free and fit then go and play for your respective state board.
BCCI is weird as hell. On one hand, they are primarily responsible for the whole crazy T20 boom in recent times and they are enforcing all of this stuff suddenly on the other hand. Bizarre!