Since about 1/5 of the jail population is comprised of illegal aliens, then we can estimate about 5*270K = 1.35M people served jail time. Since the US population is about 294M people, over 99.5% of the general population is not in jail, mostly doing honest work.
Clearly, the illegal alien community has a significantly lower rate of people who are not in jail, mostly doing honest work than the rest of the population.
Also, as mentioned in the article, 108K of those jailed illegal aliens were in jail in California, and the CA prison population is estimated to be closer to 1/2 illegal alien. Given the CA population estimate of 36M, even if all of the estimated twelve million illegal aliens were in CA (to maximize the denominator for the illegal aliens and minimize the denominator for the legal aliens plus citizens -- obviously an exaggeration), the illegal aliens would have twice the rate of members in CA jail. Since that proportion is an exaggeration, the illegal alien membership of CA jails is proportionally even higher. And, therefore, the proportion of illegal aliens not in jail, mostly doing honest work is significantly lower than in the rest of the population in California, as well.
Just because someone is not in jail does not mean they are doing honest work. They may or may not be working.