Lobbying in its purest shape, is simply people appointed by private interest groups to press or influence elected representatives at any time they are out of their chambers in the house or the senate. When compensation of any type is offered to a public official, for some special task or consideration in any legislation is done then it is a bribe.
Q.2
They can say that whatever they did was for the betterment of the economy of the country, or that they can easily say that they haven't given any gifts of any sort, because mostly there are no solid ...