Among all the critiques of too much government power, John Stuart Mill’s critique in paragraph 20 of On Liberty “Chapter V: Applications” is one of the most eloquent:

The third, and most cogent reason for restricting the interference of government, is the great evil of adding unnecessarily to its power. Every function superadded to those already exercised by the government, causes its influence over hopes and fears to be more widely diffused, and converts, more and more, the active and ambitious part of the public into hangers-on of the government, or of some party which aims at becoming the government. If the roads, the railways, the banks, the insurance offices, the great joint-stock companies, the universities, and the public charities, were all of them branches of the government; if, in addition, the municipal corporations and local boards, with all that now devolves on them, became departments of the central administration; if the employees of all these different enterprises were appointed and paid by the government, and looked to the government for every rise in life; not all the freedom of the press and popular constitution of the legislature would make this or any other country free otherwise than in name. And the evil would be greater, the more efficiently and scientifically the administrative machinery was constructed—the more skillful the arrangements for obtaining the best qualified hands and heads with which to work it. In England it has of late been proposed that all the members of the civil service of government should be selected by competitive examination, to obtain for those employments the most intelligent and instructed persons procurable; and much has been said and written for and against this proposal. One of the arguments most insisted on by its opponents, is that the occupation of a permanent official servant of the State does not hold out sufficient prospects of emolument and importance to attract the highest talents, which will always be able to find a more inviting career in the professions, or in the service of companies and other public bodies. One would not have been surprised if this argument had been used by the friends of the proposition, as an answer to its principal difficulty. Coming from the opponents it is strange enough. What is urged as an objection is the safety-valve of the proposed system. If indeed all the high talent of the country could be drawn into the service of the government, a proposal tending to bring about that result might well inspire uneasiness. If every part of the business of society which required organized concert, or large and comprehensive views, were in the hands of the government, and if government offices were universally filled by the ablest men, all the enlarged culture and practised intelligence in the country, except the purely speculative, would be concentrated in a numerous bureaucracy, to whom alone the rest of the community would look for all things: the multitude for direction and dictation in all they had to do; the able and aspiring for personal advancement. To be admitted into the ranks of this bureaucracy, and when admitted, to rise therein, would be the sole objects of ambition. Under this régime, not only is the outside public ill-qualified, for want of practical experience, to criticize or check the mode of operation of the bureaucracy, but even if the accidents of despotic or the natural working of popular institutions occasionally raise to the summit a ruler or rulers of reforming inclinations, no reform can be effected which is contrary to the interest of the bureaucracy. Such is the melancholy condition of the Russian empire, as shown in the accounts of those who have had sufficient opportunity of observation. The Czar himself is powerless against the bureaucratic body; he can send any one of them to Siberia, but he cannot govern without them, or against their will. On every decree of his they have a tacit veto, by merely refraining from carrying it into effect. In countries of more advanced civilization and of a more insurrectionary spirit, the public, accustomed to expect everything to be done for them by the State, or at least to do nothing for themselves without asking from the State not only leave to do it, but even how it is to be done, naturally hold the State responsible for all evil which befalls them, and when the evil exceeds their amount of patience, they rise against the government and make what is called a revolution; whereupon somebody else, with or without legitimate authority from the nation, vaults into the seat, issues his orders to the bureaucracy, and everything goes on much as it did before; the bureaucracy being unchanged, and nobody else being capable of taking their place.

(I modernized some of the spelling.) To try to unpack this paragraph, John Stuart Mill’s worries about overly strong government are

1. rent-seeking
2. people being focused on pleasing and influencing government officials, with all of the loss of freedom that entails
3. leaving too few talented organizers in the private sphere
4. absorbing the consciousness of people of ambition
5. rule by the civil service, with a lack of full democratic accountability, as one sees for example in Japan. 

This is a serious list of things well worth being concerned about. For a practical alternative to making the government every bigger and more powerful, while still getting the public things done we should get done, see my post “How and Why to Expand the Nonprofit Sector as a Partial Alternative to Government: A Reader’s Guide.”