The most important thing Trump said in that speech and its completely true is that these politicians ( with the exception of Ted Cruz who IMO is on a mission from God) Is that they are not going to get you to the promised land. The reason being they have to take huge sums of money from these large donors and then later the markers come in and the politician has to back down because they own them the favors.
Trump is not planning to take money. He will self fund. He won’t owe anybody and he says he’ll tell the Lobbyists to stuff it.