0 'I' applies to the speaker only, while 'there is' includes all present as possible laborers. 'Plenty' is more than 'some'. 'To be done' is the passive voice of 'to do'-- perhaps the passive stressing that the tasks exist and the active stressing the action that must be taken.
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"Work to be done"
I think this suits for title where I have list of work to do. better than "work to do"